Runners continue to run towards the finish line of the Boston Marathon as an explosion erupts near the finish line of the race in this photo exclusively licensed to Reuters by photographer Dan Lampariello after he took the photo in Boston, Massachusetts, April 15, 2013.
Police and runners react following two explosions at the Boston Marathon finish area in Boston, Massachusetts, April 15, 2013.
Officials wrap crime scene tape around an area on Boylston Street a day after two explosions at the Boston Marathon in Boston, Massachusetts April 16, 2013.
Debris is seen along Boylston Street after explosions went off at the 117th Boston Marathon in Boston, Massachusetts April 15, 2013.
Officials take crime scene photos a day after two explosions hit the Boston Marathon in Boston, Massachusetts April 16, 2013.
Alison Gardner lays flowers at the barricaded entrance at Boylston Street near the finish line of the Boston Marathon in Boston, Massachusetts April 16, 2013.
Flowers are seen at the barricaded entrance at Boylston Street near the finish line of the Boston Marathon in Boston, Massachusetts April 16, 2013.
Slideshow
Explosions go off at Boston Marathon
Pope recalls 'joy,' difficulties in final audience
Heavy rainfall in Athens floods roads, basements
Over 1,000 injured by meteor explosion in Russia
Coast Guard: Disabled cruise ship is moving again
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Clinton formally resigns as secretary of state
Body of Phoenix shooter positively identified
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BP to pay the largest criminal penalty.
Superstorm Sandy
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World
Pope recalls 'joy,' difficulties in final audience
Heavy rainfall in Athens floods roads, basements
Over 1,000 injured by meteor explosion in Russia
Coast Guard: Disabled cruise ship is moving again
Hoax call but no sign of ex-cop wanted in killings
BP to pay the largest criminal penalty.
World Muslims Celebrates Eid al-Adha with Huge Joy
Northeast buttons up against terrifying megastorm
Isaac steers clear of direct blow on New Orleans
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Business
BP to pay the largest criminal penalty.
South Africa-Turkish businesses engage in bilateral discussions