What We're Following This Evening

A potential cease-fire: The U.S. and Russia have agreed to terms for a “cessation” of hostilities among the various groups involved in Syria’s five-year-long civil war. The deal calls for all sides to comply by Friday afternoon, Damascus time.

Investigating Zika: A 16-member team from the U.S. Centers for Disease Control and Prevention has begun work in Brazil on a study to help determine whether the mosquito-borne virus leads to a condition in which babies are born with unusually small heads, the AP reported. Researchers say “evidence is mounting” for a causal link between the virus and the birth defect.

A health disclosure: Senator Claire McCaskill revealed she has breast cancer. “It’s a little scary, but my prognosis is good and I expect a full recovery,” the Democrat from Missouri wrote in a Tumblr post. McCaskill will spend the next three weeks undergoing treatment in St. Louis.

The final four: Contestants on The Bachelor, that is. The star of the reality television show that’s so bad it’s good has narrowed his pool of wife material down to four women, and will be visiting each of their hometowns in tonight’s two-hour episode. It’s kind of like the presidential primary season, but with more tears and fewer surprises.

News from this afternoon here.