Marines hold umbrellas as President Barack Obama and Turkish Prime Minister Recep Tayyip Erdogan participate in a joint news conference in the Rose Garden of the White House in Washington, Thursday, May 16, 2013. (AP Photo/Charles Dharapak)
Marines hold umbrellas as President Barack Obama and Turkish Prime Minister Recep Tayyip Erdogan participate in a joint news conference in the Rose Garden of the White House in Washington, Thursday, May 16, 2013. (AP Photo/Charles Dharapak)
Marines hold umbrellas as President Barack Obama and Turkish Prime Minister Recep Tayyip Erdogan participate in a joint news conference in the Rose Garden of the White House in Washington, Thursday, May 16, 2013. (AP Photo/Charles Dharapak)
Former President Bill Clinton speaks at the 20th anniversary of the United States Holocaust Memorial Museum in Washington, Monday, April 29, 2013. (AP Photo/Charles Dharapak)
Former President Bill Clinton speaks at the 20th anniversary of the United States Holocaust Memorial Museum in Washington, Monday, April 29, 2013. (AP Photo/Charles Dharapak)
President Barack Obama is introduced by Cecilia Boone, chair of the board of Planned Parenthood, before speaking at the 2013 Planned Parenthood National Conference in Washington, Friday, April 26, 2013. (AP Photo/Charles Dharapak)
President Barack Obama attends the memorial for firefighters killed at the fertilizer plant explosion in West, Texas, at Baylor University in Waco, Texas, Thursday, April 25, 2013. (AP Photo/Charles Dharapak)
President Barack Obama attends the memorial for firefighters killed at the fertilizer plant explosion in West, Texas, at Baylor University in Waco, Texas, Thursday, April 25, 2013. (AP Photo/Charles Dharapak)
President Obama stands with former presidents George W. Bush, Bill Clinton, George H.W. Bush, and Jimmy Carter at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, Thursday, April 25, 2013. (AP Photo/Charles Dharapak)
