H5N2 avian influenza, or bird flu, has reared its head at a commercial egg-laying facility in northwest Iowa that houses as many as 5.3 million chickens, according to state officials.

Ryan Parker
SANAA, Yemen - Dozens of people were feared dead after an airstrike Monday morning by a Saudi-led military coalition set off an explosion.MOHAMMED ALI KALFOOD and KAREEM FAHIM
What are the origins of 420? And how has the "holiday" changed since states began legalizing marijuana? For many, what used to be a day of protest is now a day of celebration.Rob Hotakainen
In New York, almost 120,000 black men between the ages of 25 and 54 are missing from everyday life. In Chicago, 45,000 are, and more than 30,000 are missing in Philadelphia. And across the South, hundreds of thousands more are missing.JUSTIN WOLFERS, DAVID LEONHARDT and KEVIN QUEALY
Amid national protests over police treatment of black men, Baltimore officials have promised to investigate the death of Freddie Gray, an apparently healthy 25-year-old who was rushed to a hospital with spinal cord injuries after being chased and tackled by police officers.Sheryl Gay Stolberg
Several Somali American men were arrested by federal law enforcement officials Sunday after a 10-month investigation into American recruits trying to join Islamic State terrorists overseas.Kurtis Lee
After announcing plans in January, President Obama is formally recommending that Congress expand the wilderness designation in the Arctic National Wildlife Refuge, including in the potentially oil-rich coastal plain.Alex DeMarban
A “sophisticated cyberattack” on Premera Blue Cross affected 11 million people in the U.S. Premera Blue Cross Blue Shield Alaska is encouraging members to apply for free credit monitoring and identity theft services.Laurel Andrews
Hundreds of people were feared lost in the Mediterranean Sea on Sunday after a boat carrying migrants toward Europe capsized off the Libyan coast, authorities said, in what appeared to be the latest and deadliest in a series of mass drownings.Tom Kington and Patrick J. McDonnell
 In a gruesome replay of beheadings of captive Christians, an Islamic State video disseminated on social media Sunday purportedly shows the point-blank shootings and decapitations of two groups of Ethiopian Christians in Libya.Laura King