Newly re-elected U.S. President Barack Obama (5th L) poses for photos with ASEAN leaders during the 4th ASEAN-U.S. Leaders' Meeting in Phnom Penh, Cambodia, Nov. 19, 2012. Newly re-elected U.S. President Barack Obama arrived here on Monday afternoon to attend the 4th ASEAN-U.S. Leaders' Meeting and the 7th East Asia Summit. (Xinhua/Li Peng)

Newly re-elected U.S. President Barack Obama (2nd R) poses for photos with ASEAN leaders during the 4th ASEAN-U.S. Leaders' Meeting in Phnom Penh, Cambodia, Nov. 19, 2012. Newly re-elected U.S. President Barack Obama arrived here on Monday afternoon to attend the 4th ASEAN-U.S. Leaders' Meeting and the 7th East Asia Summit. (Xinhua/Li Peng)

Newly re-elected U.S. President Barack Obama (C) poses for photos with ASEAN leaders during the 4th ASEAN-U.S. Leaders' Meeting in Phnom Penh, Cambodia, Nov. 19, 2012. Newly re-elected U.S. President Barack Obama arrived here on Monday afternoon to attend the 4th ASEAN-U.S. Leaders' Meeting and the 7th East Asia Summit. (Xinhua/Ma Ping)

Newly re-elected U.S. President Barack Obama (C) walks into the conference room during 4th ASEAN-U.S. Leaders' Meeting in Phnom Penh, Cambodia, Nov. 19, 2012. Newly re-elected U.S. President Barack Obama arrived here on Monday afternoon to attend the 4th ASEAN-U.S. Leaders' Meeting and the 7th East Asia Summit. (Xinhua/Ma Ping)

Newly re-elected U.S. President Barack Obama (3rd L) poses for photos with ASEAN leaders during the 4th ASEAN-U.S. Leaders' Meeting in Phnom Penh, Cambodia, Nov. 19, 2012. Newly re-elected U.S. President Barack Obama arrived here on Monday afternoon to attend the 4th ASEAN-U.S. Leaders' Meeting and the 7th East Asia Summit. (Xinhua/Ma Ping)

Newly re-elected U.S. President Barack Obama attends the 4th ASEAN-U.S. Leaders' Meeting in Phnom Penh, Cambodia, Nov. 19, 2012. Newly re-elected U.S. President Barack Obama arrived here on Monday afternoon to attend the 4th ASEAN-U.S. Leaders' Meeting and the 7th East Asia Summit. (Xinhua/Ma Ping)

Newly re-elected U.S. President Barack Obama (R) attends the 4th ASEAN-U.S. Leaders' Meeting in Phnom Penh, Cambodia, Nov. 19, 2012. Newly re-elected U.S. President Barack Obama arrived here on Monday afternoon to attend the 4th ASEAN-U.S. Leaders' Meeting and the 7th East Asia Summit. (Xinhua/Ma Ping)

Newly re-elected U.S. President Barack Obama (L Front) and U.S. Secretary of State Hillary Clinton (2nd R Front) attend the 4th ASEAN-U.S. Leaders' Meeting in Phnom Penh, Cambodia, Nov. 19, 2012. Newly re-elected U.S. President Barack Obama arrived here on Monday afternoon to attend the 4th ASEAN-U.S. Leaders' Meeting and the 7th East Asia Summit. (Xinhua/Ma Ping)

Newly re-elected U.S. President Barack Obama (5th L) poses for photos with ASEAN leaders during the 4th ASEAN-U.S. Leaders' Meeting in Phnom Penh, Cambodia, Nov. 19, 2012. Newly re-elected U.S. President Barack Obama arrived here on Monday afternoon to attend the 4th ASEAN-U.S. Leaders' Meeting and the 7th East Asia Summit. (Xinhua/Li Peng)