The U.S. refugee program
Since 1980, about 3 million people, including the Tsarnaev family, have been admitted into the U.S. under a refugee program for those who are persecuted or fear persecution because of race, religion, nationality, or political opinion.
National Journal

Brothers team up on terrorist plots
A surprising number of terrorist plots involve brothers. Six of the 19 hijackers in the 9/11 attacks were brothers, with each sibling team working together on separate planes; three of the conspirators in the 2007 plot to bomb Fort Dix were brothers; and last year, two brothers from South Florida were accused of plotting to use a weapon of mass destruction in New York City. Counterterrorism experts say brothers can create a closed world where radical beliefs and actions become justified.
Slate.com

Skin cancer and sunscreen use
More than one out of three Americans do not ever use sunscreen, including 27.3 percent of people who were previously diagnosed with a form of skin cancer.
NBCNews.com

The growing power of the filibuster
During Franklin Roosevelt’s 12-year tenure as president, the Senate used the filibuster a total of six times, including twice in the 1930s to block anti-lynching legislation. In the past six years, the Republican minority has used the filibuster to block or stall legislation or presidential nominees more than 170 times.
Salon.com

The cruelest month
April really can be the cruelest month. The Boston bombings, the Deepwater oil spill (2010), the Virginia Tech shootings (2007), Columbine (1999), the Oklahoma City bombing (1995), and the Branch Davidian tragedy (1993) all occurred between April 15 and April 20.
The Washington Post