The wreckage of a fertilizer plant burns after an explosion at the plant in the town of West, near Waco, Texas early April 18, 2013. The deadly explosion ripped through the fertilizer plant late on Wednesday, injuring more than 160 people, leveling dozens of homes and damaging other buildings including a school and nursing home, authorities said. #

The remains of a home burn in West, Texas, on April 18, 2013. The massive explosion killed as many as 14 people and injured more than 160, shaking the ground with the strength of a small earthquake and leveling homes and businesses for blocks in every direction. #

A video image provided by WFAA-TV shows injured people being treated on a flood-lit high school football field, turned into a staging area after the blast in West Texas, on April 17, 2013. #

Waco Police spokesperson William Swanton speaks at a media conference regarding an explosion at a fertilizer plant in the town of West, near Waco, Texas, on April 18, 2013. #

Bryan Anderson holds a phone with a picture of his son Kaden Anderson from his hospital bed, before a press conference on Thursday, April 18, 2013, in West, Texas. The Andersons were in a truck near the fertilizer plant that exploded. #

A Dallas Regional Urban Search and Rescue Truck, parked by a destroyed apartment complex with emergency responders working the scene in West, Texas, on April 18, 2013. #

Firefighter check a children's bedroom during search and rescue efforts of an apartment complex destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the plant killed as many as 15 people and injured more than 160, officials said overnight. #

Workers with Johnson Roofing cover up the window frames of Carol Anne Kocian's home with sheets of plywood on April 18, 2013 in West, Texas. Kocian lives very close to the site of the deadly fertilizer plant explosion that blew out all the windows of her house Wednesday. #

Displaced residents wait at a checkpoint for permission go back to their homes Saturday, April 20, 2013, three days after an explosion at a fertilizer plant in West, Texas. #

Town resident Debbie Keel holds her six-month-old granddaughter Kennedy along the road as they wait to gain clearance from police officers (background) to return to their home, after a fertilizer plant explosion in West, Texas, on April 20, 2013. #

A giant hole in the ceiling of the West High School gymnasium shows where an explosion at the West Fertilizer Company a day earlier launched debris through the roof, on April 18, 2013. #

A smashed car sits in front of an apartment complex destroyed by the explosion in West, Texas, as firefighters conduct a search and rescue on Thursday, April 18, 2013. #

Pastor John Crowder talks to his congregation during a service for the First Baptist Church held in a field, on Sunday, April 21, 2013, four days after the explosion, in West, Texas. The church could not meet in their building because it was inside a damage zone. #

Hewitt, Texas police officer Mike Zahirniak (right) comforts his son, Coy Zahirniak, 9, outside the West Community Center the day after the explosion, on April 18, 2013. Coy alerted his family to the fire across the street from his grandfather Willie Zahirniak's home and the plant exploded as they evacuated. The home was destroyed and Coy has been credited for saving his family from harm. #

A high school student gets a hug from a teacher from West, Texas, as students arrive for classes at a temporary facility provided by the Connally Independent School District, on April 22, 2013, in Waco, Texas. West students returned back to class today after the massive explosion five days ago. #