April 16, 2013
U.S. President Barack Obama makes a statement on the Boston bombing from the White House in Washington April 16, 2013. Two bombs ripped through the crowd at the finish line of the Boston Marathon on Monday, killing three people, maiming others and injuring more than 100 in what a White House official said would be treated as an "act of terror."
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President Barack Obama thanked Russian President Vladimir Putin on Friday for Moscow's close cooperation on counterterrorism after the Boston Marathon bombings, and they agreed to continue working together on security issues.
President Barack Obama called the Boston Marathon bombings an "act of terror" on Tuesday and investigators said no additional explosive devices have been found.