The George W. Bush Presidential Center

Former president George W. Bush waves three fingers, signifying his place in U.S. history as the 43rd president during the dedication of the George W. Bush Presidential Center, Dallas, Texas, April 25, 2013. (VOA/Brian Allen)

Former president George W. Bush, former first lady Laura Bush and President Obama share a lighter moment during the dedication of the George W. Bush Presidential Center, Dallas, Texas, April 25, 2013. (VOA/Brian Allen)

Former president George W. Bush and his wife, former first lady Laura Bush, arrive at the dedication of the George W. Bush Presidential Center, Dallas, Texas, April 25, 2013.

President Barack Obama and former presidents George W. Bush, Bill Clinton, George H.W. Bush and Jimmy Carter at the George W. Bush Presidential Center, Dallas, Texas, April 25, 2013.

From left, First Lady Michelle Obama, former first lady Laura Bush, former first lady Hillary Clinton, former first lady Barbara Bush and former first lady Rosalynn Carter at the George W. Bush Presidential Center, Dallas, Texas, April 25, 2013.

The exterior of the George W. Bush Presidential Center, Dallas. Texas.

A replica of the Oval Office is seen during a tour of the George W. Bush Presidential Center, April 24, 2013.

Displays on presidential policy in the George W. Bush Presidential Center, Dallas, Texas, April 24, 2013.

Former Ghana President John Kufuor speaks with former Labor Secretary Elaine Chao at the dedication of the George W. Bush Presidential Center, Dallas, Texas, April 25, 2013.

Former British Prime Minister Tony Blair arrives for the dedication of the George W. Bush Presidential Center, Dallas, Texas, April 25, 2013.