Days after an EF5 tornado with peak winds estimated at 210 mph (340 kph), struck Moore, Oklahoma, killing 24 people, including 10 children, residents returned to what was left of their homes to salvage what they could. The tornado was the strongest in the United States in nearly two years, damaging or destroying 1,200 homes and affecting 33,000 people. Collected here are images of Moore residents, helped by their families, friends and community members, as they begin the process of picking up the pieces of their lives. [39 photos]

Last month the Finnish Defence Forces put an archive of 160,000 WWII-era photographs online. The images record the war years from 1939 to 1945, spanning three conflicts the Finns recognize as the Winter War (against an invading Soviet Union), the Continuation War (striking against the Soviets alongside the Germans) and the Lapland War (against the Germans for control of Lapland). After spending hours poring through this fascinating archive, I've gathered this collection, just a glimpse of what was made available. A couple of notes on the images -- the swastika was used as the official national marking of the Finnish Air Force and Tank Corps between 1918 and 1945, and all captions were relatively brief, and written in Finnish, so please let me know in the comments if there are any mistakes, or if you can elaborate on what is pictured. See also World War II in Photos on in Focus. [49 photos]

Yesterday afternoon, a monster tornado struck Moore, Oklahoma, near Oklahoma City. The twister, with winds of at least 200 mph, traveled for 20 miles, leaving a two-mile-wide path of destruction, flattening homes, smashing vehicles, and killing at least 24 people, including nine children. [38 photos]

Over the past week, dozens of tornadoes have touched down in the plains states, from Texas to Illinois, and more turbulent weather is expected. Late last week, 16 twisters tore through parts of north Texas, killing at least six people. Over the weekend, more tornadoes in Oklahoma, Kansas, and Iowa caused damage, injuries and another two deaths. The National Weather Service forecasts extreme weather throughout the same areas today, bringing hail, lightning, and still further extreme weather. [25 photos]

The 25th annual National Geographic Traveler Photo Contest is under way, and entries will be accepted for another six weeks, until June 30, 2013. First prize winner will receive a 10-day Galapagos expedition for two. National Geographic was once more kind enough to allow me to share some of the early entries with you here, gathered from four categories: Travel Portraits, Outdoor Scenes, Sense of Place, and Spontaneous Moments. Photos and captions by the photographers. [42 photos]

Last weekend, Reuters photographer Carlos Barria traveled to Zheijiang Province, China, to photograph some of the 1,000 Harley Davidson enthusiasts who attended China's 5th annual Harley Davidson National Rally, part of the company's 110-year anniversary. Harley Davidson only began official sales in China in 2005, and its bikes are considered to be luxury items by Chinese tax authorities, so they are taxed at extremely high rates -- a 2013 motorcycle might sell for 200,000 yuan ($32,500), approximately four times the average annual salary in Beijing. Transportation authorities have also placed Harleys in the same category as electric bikes, horses and bicycles, so they cannot be ridden on highways and major avenues. [18 photos]

Canadian astronaut Chris Hadfield, commander of the just-completed Expedition 35 aboard the International Space Station, landed safely yesterday in Kazakhstan along with crew members Tom Marshburn and Roman Romanenko after five months in orbit. In his time aboard the ISS, Commander Hadfield not only took hundreds of photographs and conducted conferences with students on Earth, he took his stories to social media, catching the attention of the world. Hadfield, with the help of his sons Evan and Kyle, took the web by storm, creating popular presences on Facebook, Twitter, Tumblr, YouTube, and more. His videos answered questions about everyday existence in zero-gravity with a dose of science mixed with humor. To top things off, Hadfield, also a musician, finished his command mission by releasing his own version of David Bowie's "Space Oddity", with Bowie's blessing. Gathered here are some photos of and by Commander Hadfield during his remarkable mission. [40 photos]

Yesterday was the fifth anniversary of the 2008 Sichuan Earthquake, a magnitude 8.0 quake which struck a mountainous region in southwestern China, destroying several villages, killing more than 70,000, and leaving another 18,000 still listed as missing. In the hard-hit town of Beichuan, dozens of massive buildings toppled or collapsed. Chinese authorities decided to stabilize the remaining buildings after the earthquake, preserving the entire town as a memorial to the tremendous loss. Collected here are photographs of Beichuan as it stands today, mourners paying their respects, a newly-opened museum, and some of the rebuilding taking place in the region. See also: The Legacy of Sichuan's Big Earthquake. [26 photos]

While neighboring North Korea makes worldwide headlines with threats and demands, South Koreans have adjusted slightly to possible dangers, but largely carry on with their everyday lives. The war that halted in 1953 reverberates strongly today, including the continued strong presence of U.S. military forces near the demilitarized zone that separates the two Koreas. South Koreans have rapidly become a country of digital natives, with city dwellers quickly adopting new technologies. The megacity of Seoul now has a population nearing 11 million -- more than 20 percent of the entire country, all living in one dense, sprawling city, home to highrise apartments, shamanistic shrines, and grand palaces. Collected here are recent images from South Korea. [36 photos]

One visible sign of China's recent economic growth is the rise in prominence of inventors and entrepreneurs. For years now, Chinese farmers, engineers, and businessmen have taken on ambitious do-it-yourself projects, constructing homemade submarines, helicopters, robots, safety equipment, weapons and much more. Some of the inventions are built out of passion, some with an eye toward profit, (some certainly safer than others), and a few have already led to sales for the inventors. Gathered here are recent photos of this DIY movement across China. [39 photos]

The border between the United States and Mexico stretches 3,169 kilometers (1,969 miles), crossing deserts, rivers, towns, and cities from the Pacific to the Gulf of Mexico. Every year, an estimated 350 million people legally cross the border, with another 500,000 entering into the United States illegally. No single barrier stretches across the entire border, instead, it is lined with a patchwork of steel and concrete fences, infrared cameras, sensors, drones, and nearly 20,000 U.S. Border Patrol agents. As immigrants from Mexico and other Central and South American countries continue to try to find their way into the U.S., Congress is now considering an immigration reform bill called the Border Security, Economic Opportunity and Immigration Modernization Act of 2013. The bill proposes solutions to current border enforcement problems and paths to citizenship for the estimated 11 million existing illegal immigrants in the U.S. Gathered here are images of the US-Mexico border from the past few years. [40 photos]

Before 1995, the small Caribbean island of Montserrat was a relatively quiet tourist destination -- a British Overseas Territory with a population of 11,000. Then, the Soufriere Hills volcano came to life after remaining quiet since the 17th century. Thousands lived in the direct path of ensuing mudflows and pyroclastic flows -- cascades of hot gas and rock. The capital city of Plymouth and 20 other settlements were completely destroyed. Dozens lost their lives initially, and thousands were evacuated as eruptions continued off and on for years afterward. More than 7,000 residents moved away, and tourist dollars vanished. While the volcano is still active, it has been relatively quiet since early 2010, and nearly half of the island remains a designated exclusion zone. [31 photos]

Yesterday, the International Center of Photography honored the recipients of its 2013 Infinity Awards. The winner of the Photojournalism category was David Guttenfelder, currently Chief Asia Photographer for the Associated Press. I've featured many of Guttenfelder's photos here over the years, primarily his images from inside North Korea. The design and video production studio MediaStorm was commissioned to create short films about each of the Infinity Award recipients, and was kind enough to share this one about David Guttenfelder's years of photojournalism in Africa, Afghanistan and Asia. Take a few minutes to watch, it's an interesting look into the life of a photographer, especially the challenges of working inside North Korea. [1 video]

Last month, reports surfaced, later confirmed by Afghan President Hamid Karzai, that the U.S. Central Intelligence Agency has been delivering bags of cash to Karzai for a decade, in part to buy continued access and cooperation during the war. The New York Times reported that the payments had not resulted in the influence the CIA sought, and had instead fueled corruption and empowered warlords. A further report by the U.N. stated that opium cultivation across Afghanistan had increased for the third year in a row. As Western troops continue the long process of preparing for their December 2014 withdrawal, evidence of significant progress in Afghanistan remains elusive. The photos below are just a glimpse of this conflict over the past month, part of the ongoing series here on Afghanistan. [39 photos]

Keeping with recent tradition, former Queen Beatrix of the Netherlands abdicated the throne today in favor of her son, Willem-Alexander, who has now become the first Dutch king in more than a century. Though the position has little political power, the Royal Family enjoys broad popularity and symbolic significance. Tuesday, tens of thousands dressed in orange and gathered in Amsterdam's Dam Square next to the Royal Palace to view the accession of King Willem-Alexander Claus George Ferdinand of the Netherlands. [29 photos]

Last Wednesday, an eight-story commercial building called Rana Plaza, in Savar, Bangladesh, collapsed suddenly with more than 3,000 garment industry workers inside. In the five days since, rescuers have been digging frantically, searching for survivors, rescuing hundreds. As of today, with the confirmed death toll nearing 400, attempts to locate any more survivors have been halted. Eight people have been arrested so far, including the owner of the illegally-constructed facility, who was apparently caught while trying to flee to India yesterday. In the days since the disaster, families displayed photographs as they gathered around the destroyed building, hundreds of their loved ones still listed as missing. [39 photos]

The winners of the 2013 Sony World Photography Awards have just been announced. Norwegian photographer Andrea Gjestvang was announced as the Photographer of the Year, for her series of portraits of children and youths who survived the July 2011 massacre on the island of Utoeya, outside Oslo. This year's contest attracted more than 122,000 entries from 170 countries. The photographs were judged in six different competition categories, including Professional, Open, and Student Focus. The organizers have been kind enough to share some of their winning images with In Focus, gathered below. See also the shortlist of winners, earlier on In Focus. [20 photos]

Robotic probes launched by NASA, the European Space Agency (ESA), and others are gathering information all across the solar system. We currently have spacecraft in orbit around the Sun, Mercury, Venus, Earth, Mars, and Saturn, and two operational rovers on Mars. Several others are on their way to smaller bodies, and a few are heading out of the solar system entirely. Although the Space Shuttle no longer flies, astronauts are still at work aboard the International Space Station, performing experiments and sending back amazing photos. With all these eyes in the sky, I'd like to take another opportunity to put together a recent photo album of our solar system -- a set of family portraits, of sorts -- as seen by our astronauts and mechanical emissaries. This time, we have a great shot of comet Pan-STARRS between the Earth and Sun, some very sharp images from Mars rover Curiosity, a preview image of Comet ISON, potentially the "comet of the century", when it approaches in November, intriguing glimpses of Saturn and its moons, and, of course, lovely images of our home, planet Earth. [35 photos]