STORY: A moment of silence in Boston to mark the attack on the Boston Marathon a week ago.
The marathon draws about 27,000 runners each year and hundreds of thousands of spectators, making it one of Boston's best-attended sporting events.
On Monday, federal prosecutors charged badly wounded Boston Marathon bombing suspect Dzhokhar Tsarnaev in his hospital bed with using a weapon of mass destruction, a charge that could result in the death penalty, officials said.
A court spokesman said a magistrate judge was present when Tsarnaev was charged at Boston's Beth Israel Deaconess Hospital, where Tsarnaev was listed in serious condition.
"Although our investigation is ongoing, today's charges bring a successful end to a tragic week for the city of Boston, and for our country," U.S. Attorney General Eric Holder said in a statement.
Tsarnaev, 19, was also charged with malicious destruction of property resulting in death.
