A runner's camera captured the first explosion at the finishing line of the Boston Marathon. Three people were killed and more than 100 injured as two blasts sent smoke and debris soaring into the air.
New photos of the suspects identified by officials as Dzhokar A. Tsarnaev, 19 and Tamerlan Tsarnaev, 26 have been released.
The FBI has released pictures and video of two suspects in the Boston Marathon bombing, seeking the public's help.
President Obama attended a memorial service in Boston today, paying tribute to the victims of Monday's terrorist attack.