National News
FBI Arrests Man Suspected of Sending Ricin Poison to Obama
U.S. Senate Rejects Expansion of Firearm Background Checks
Boston Federal Courthouse Evacuated Following Bomb Threat [LIVE VIDEO]
Conflicting Reports of Arrest Made In Boston Marathon Bombing
Letter to Obama May have Contained Ricin Poison
Senate gun vote nears, background check bill in peril
USDA starts new program to track farm animals
DHS: No Evidence of Broader Plot Tied to Boston
London Marathon To Go Ahead After Boston Bombings
Determined to put on a show of "solidarity" for Boston, London Marathon organizers will stage their race on Sunday despite the threat of terrorism.
The British capital has long been a top target for terrorists, and concerns have only intensified ahead of Sunday's race after Monday's harrowing scenes at the Boston Marathon, where bombs killed three people and injured many more.

