Talk of the Nation

Explosions at the Boston Marathon, potentially ricin-laced letters intercepted en route to the White House and Sen. Roger Wicker, and an explosion at a fertilizer plant in Texas have each prompted investigations. In each case, authorities sift through evidence to construct a timeline of events.

Fifteen-year-old Malala Yousafzai has become a symbol of hope for change in Pakistan and the world. Since her near-fatal shooting in 2012, her voice and reach has grown, as she speaks out against the Taliban's influence, and advocates for education for Pakistani youth.

Transcript

CELESTE HEADLEE, HOST:

This is TALK OF THE NATION. I'm Celeste Headlee.

For Arab and Muslim-Americans, news of a terrorist attack or possible terrorist attack on U.S. soil is complicated by fears that the perpetrator might be a member of their own community and in the hours after the Boston Marathon, rumors of a young Saudi suspect spread like wildfire despite statements from law enforcement that no suspect had been identified.

Transcript

CELESTE HEADLEE, HOST:

You know, many of those injured and all three of the people who were killed at the scene of the Boston Marathon were there to cheer on the runners. They weren't running. Running is usually a fairly solitary sport, but a marathon is a unique moment when these athletes run alongside others, for one thing, and they're cheered on by sometimes thousands of spectators. Runners rely on those familiar faces and their cheerful signs to motivate them through all 26.2 miles.

The bombings at the Boston Marathon have lead to heightened security across the world. Organizers of the London Marathon contacted local police to discuss increased security measures. Officials in California monitored its emergency system after the blast.