President Barack Obama meets with members of his national security team to discuss developments in the Boston bombings investigation, in the Situation Room of the White House, Friday, April 19, 2013.

President Barack Obama meets with members of his national security team to discuss developments in the Boston bombings investigation, in the Situation Room of the White House, April 19, 2013. Pictured, from left, are: FBI Director Robert Mueller; Lisa Monaco, Assistant to the President for Homeland Security and Counterterrorism; Attorney General Eric Holder; Deputy National Security Advisor Tony Blinken; and Vice President Joe Biden. (Official White House Photo by Pete Souza)

This official White House photograph is being made available only for publication by news organizations and/or for personal use printing by the subject(s) of the photograph. The photograph may not be manipulated in any way and may not be used in commercial or political materials, advertisements, emails, products, promotions that in any way suggests approval or endorsement of the President, the First Family, or the White House.