Singapore's Prime Minister Lee Hsien Loong (2nd R) shares a light moment with U.S. Senators John McCain (R-AZ), Joseph Lieberman (I-CT) (2nd L) and Lieberman's wife, Hadassah (L), before their meeting at the Istana presidential palace in Singapore June 1, 2012. McCain and Lieberman are in Singapore for the IISS Asia Security Summit: The Shangri-La Dialogue. REUTERS/Tim Chong (SINGAPORE - Tags: MILITARY POLITICS)