Updated: April 16, 2013, 12:00 AM
In pictures: Explosions rip apart the Boston Marathon
BOSTON, MA - APRIL 15: People look on at the corner of Stuart and Dartmouth St., near the finish line after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. Two people are confirmed dead and at least 28 injured after at least two explosions went off near the finish line to the marathon. Darren McCollester /Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY == *** Local Caption *** 917863-01-09.jpg
A runner sits near Kenmore Square after two bombs exploded during the 117th Boston Marathon Alex Trautwig/Getty Images/AFP
Bill Iffrig, 78, lies on the ground as police officers react to a second explosion at the finish line of the Boston Marathon. AP Photo/The Boston Globe/ John Tlumacki
Medical responders run an injured man past the finish line the 2013 Boston Marathon following an explosion in Boston, Monday, April 15, 2013. AP Photo / Charles Krupa
People react as an explosion goes off near the finish line of the 2013 Boston Marathon in Boston. AP Photo/The Boston Globe, David L Ryan
Medical workers aid an injured man at the 2013 Boston Marathon following an explosion in Boston. AP Photo/The Boston Globe, David L. Ryan
Injured people and debris lie on the sidewalk near the Boston Marathon finish line following an explosion in Boston. AP Photo/MetroWest Daily News, Ken McGagh
Injured people and debris lie on the sidewalk near the Boston Marathon finish line following the explosion in Boston. AP Photo/MetroWest Daily News, Ken McGagh
A woman is comforted by a man near a triage tent set up for the Boston Marathon after explosions went off at the 117th Boston Marathon in Boston. Reuters / Jessica Rinaldi
A man in a bomb-disposal suit investigates the site of an explosion which went off on Boylston Street during the 117th Boston Marathon in Boston. Reuters / Jessica Rinaldi
A Boston police officer wheels in injured boy down Boylston Street as medical workers carry an injured runner following an explosion during the 2013 Boston Marathon in Boston. AP Photo/Charles Krupa
Two explosions shattered the euphoria of the Boston Marathon finish line on Monday, sending authorities out on the course to carry off the injured while the stragglers were rerouted away from the smoking site of the blasts. AP Photo/The Boston Globe, Davi???
People assist an injured after an explosion at the 2013 Boston Marathon in Boston. AP Photo/The Daily Free Press, Kenshin Okubo.
An injured person is helped on the sidewalk near the Boston Marathon finish line following an explosion in Boston, Monday, April 15, 2013. AP Photo/MetroWest Daily News, Ken McGagh
An injured woman is tended to at the finish line of the Boston Marathon. AP Photo/The Boston Globe, John Tlumacki.
An injured and dazed man in the wake of the Boston Marathon explosion. AP Photo/The Daily Free Press, Kenshin Okubo
People run for safety after the two explosions rocked the Boston Marathon. AP Photo/The Daily Free Press, Kenshin Okubo
President Barack Obama pauses as he begins to speak in the James Brady Press Briefing Room at the White House in Washington following the explosions at the Boston Marathon. AP Photo/Charles Dharapak
Still image taken from video courtesy of NBC shows an explosion at the Boston Marathon. Reuters /NBC/Handout
Runners continue to run towards the finish line of the Boston Marathon as an explosion erupts near the finish line of the race. Reuters/Dan Lampariello