President Barack Obama, with Commanding General Jeffrey Delgado of the Philippine Air Force, walks past an honor guard at Ninoy Aquino International Airport prior to departure from Manila, Philippines, April 29, 2014.

President Barack Obama, with Commanding General Jeffrey Delgado of the Philippine Air Force, walks past an honor guard at Ninoy Aquino International Airport prior to departure from Manila, Philippines, April 29, 2014.

President Barack Obama, with Larry Adkison, Superintendent, Manila American Cemetery, participate in a wreath laying ceremony at the Manila American Cemetery in Manila, Philippines, April 29, 2014.

President Barack Obama, with Larry Adkison, Superintendent, Manila American Cemetery, participate in a wreath laying ceremony at the Manila American Cemetery in Manila, Philippines, April 29, 2014.

Carolina Garcia Delfin, 94, a Filipina nurse who fought in the resistance against Japanese forces during World War II, kisses President Barack Obama after he mentioned her in his remarks to American and Philippine troops at Fort Bonifacio in Manila, Philippines, April 29, 2014.

Carolina Garcia Delfin, 94, a Filipina nurse who fought in the resistance against Japanese forces during World War II, kisses President Barack Obama after he mentioned her in his remarks to American and Philippine troops at Fort Bonifacio in Manila, Philippines, April 29, 2014.

President Barack Obama views the COMET electric vehicle at the Sofitel Philippine Plaza Manila in Manila, Philippines, April 29, 2014.

President Barack Obama views the COMET electric vehicle at the Sofitel Philippine Plaza Manila in Manila, Philippines, April 29, 2014.

A U.S. Secret Service agent shines a flashlight for President Barack Obama as he walks from Marine One upon arrival at the Florento landing zone in Manila, Philippines, April 28, 2014.

A U.S. Secret Service agent shines a flashlight for President Barack Obama as he walks from Marine One upon arrival at the Florento landing zone in Manila, Philippines, April 28, 2014.

President Barack Obama and President Benigno S. Aquino III are reflected in a mirror as they greet members of the Aquino family prior to a state dinner at the Malacañang Palace in Manila, Philippines, April 28, 2014.

President Barack Obama and President Benigno S. Aquino III  are reflected in a mirror as they greet members of the Aquino family prior to a state dinner at the Malacañang Palace in Manila, Philippines, April 28, 2014.

President Barack Obama stretches to shake the hand of a little girl during a U.S. Embassy meet and greet at the Sofitel Philippine Plaza Manila in Manila, Philippines, April 28, 2014.

President Barack Obama stretches to shake the hand of a little girl during a U.S. Embassy meet and greet at the Sofitel Philippine Plaza Manila in Manila, Philippines, April 28, 2014.

Children help President Barack Obama to his feet after he sat on the floor to have a group photo with them during a U.S. Embassy meet and greet at the Sofitel Philippine Plaza Manila in Manila, Philippines, April 28, 2014.

Children help President Barack Obama to his feet after he sat on the floor to have a group photo with them during a U.S. Embassy meet and greet at the Sofitel Philippine Plaza Manila in Manila, Philippines, April 28, 2014.

Marine One flies over Manila, Philippines, April 28, 2014.

Marine One flies over Manila, Philippines, April 28, 2014.