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WASHINGTON, DC - APRIL 23: US President Barack Obama makes a statement on the Brady Briefing room at the White House April 23, 2015 in Washington, DC. President Obama talked about a US drone strike that targeted a suspected al Qaeda compound in Pakistan but inadvertently killed an American and Italian being held hostage by the group. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - APRIL 23:  US President Barack Obama makes a statement on the Brady Briefing room at the White House April 23, 2015 in Washington, DC.  President Obama talked about a US drone strike that targeted a suspected al Qaeda compound in Pakistan but inadvertently killed an American and Italian being held hostage by the group.  (Photo by Mark Wilson/Getty Images)