U.S. Undersecretary of State for Political Affairs William Burns during a ceremony at the Cambodia National Museum in Phnom Penh July 18, 2010

Cambodian Deputy Prime Minister Men Sam An (L) poses for a photo with U.S. Undersecretary of State for Political Affairs William Burns during a ceremony at the Cambodia National Museum in Phnom Penh July 18, 2010. Seven Angkorean artefacts which were illegally smuggled into the United States over the years were returned during the ceremony. REUTERS/Chor Sokunthea

U.S. Under Secretary of State William Burns (R) listens to Youk Chang (C), director of the Documentation Center of Cambodia, at the Khmer Rouge prison of Tuol Sleng (S-21) in Phnom Penh July 17, 2010. Also pictured is U.S ambassador to Cambodia Car Rodley (L). REUTERS/Chor Sokunthea

U.S. Under Secretary of State William Burns (R) listens to Youk Chang, director of the Documentation Center of Cambodia, at the former Khmer Rouge prison of Tuol Sleng (S-21) in Phnom Penh July 17, 2010. REUTERS/Chor Sokunthea

U.S. Under Secretary of State for political affairs William Burn, right, listens to Youk Chhang, left, director of Documentation Center of Cambodia, as they walk through cells of Tuol Sleng genocide museum, formerly the regime's notorious S-21 prison in Phnom Penh, Cambodia, Saturday, July 17, 2010. Burn on Saturday takes his official visit to Tuol Sleng genocide museum before his official scheduled to meet Cambodia's Prime Minister Hun Sen at Cambodian Council of Minister. (AP Photo/Heng Sinith)

Men Sam An, left, the Cambodian deputy prime minister, receives a sandstone sculpture from U.S. Undersecretary of State William Burn, right, at the Cambodian National Museum in Phnom Penh, Cambodia on Sunday, July 18, 2010. Cambodia on Sunday held its official handing-over ceremony to receive seven sculptures from the Angkorian era that had been smuggled out of Cambodia, from the United States. (AP Photo/Heng Sinith)

Photographers and TV cameramen try to shoot images of artifact sculptures returned from the U.S. during its handing-over ceremony at the Cambodian National Museum in Phnom Penh, Cambodia on Sunday, July 18, 2010. Cambodia on Sunday held its official handing-over ceremony to receive seven sculptures from the Angkorian era that had been smuggled out of Cambodia, from the United States. (AP Photo/Heng Sinith)

U.S. Under Secretary of State for political affairs William Burn, right, listens to Youk Chhang, left, director of Documentation Center of Cambodia, at Tuol Sleng genocide museum, formerly the regime's notorious S-21 prison in Phnom Penh, Cambodia, Saturday, July 17, 2010. Burn is scheduled to meet Cambodia's Prime Minister Hun Sen at Cambodian Council of Minister on Saturday. (AP Photo/Heng Sinith)

The head of a male divinity artefact dating from the 12th century and the torso of a male divinity artefact dating from the 11th century are displayed during a ceremony at the Cambodia National Museum in Phnom Penh July 18, 2010. Seven Angkorean artefacts which were illegally smuggled into the United States over the years were returned during the ceremony. REUTERS/Chor Sokunthea

A sandstone sculpture is on display at the Cambodian National Museum in Phnom Penh, Cambodia on Sunday, July 18, 2010. Cambodia on Sunday held its official handing-over ceremony to receive seven sculptures from the Angkorian era that had been smuggled out of Cambodia, from the United States. (AP Photo/Heng Sinith)

A Cambodian, rear, stands behind sandstone sculptures on display at the Cambodian National Museum in Phnom Penh, Cambodia on Sunday, July 18, 2010. Cambodiaon Sunday held its official handing-over ceremony to receive seven sculptures from the Angkorian era that had been smuggled out of Cambodia, from the United States. (AP Photo/Heng Sinith)

Angkorean artefacts are displayed during a ceremony at the Cambodia National Museum in Phnom Penh July 18, 2010. The artefacts are an Angkorean decorative ornament used in temples (front), a head of a male Angkorean Divinity artefact (C) dating from the 12th century and a torso of a male Angkorean Divinity artefact (rear) dating from the 11th century. The artefacts are part of the seven Angkorean artefacts which were illegally smuggled into the United States over the years and returned during the ceremony. REUTERS/Chor Sokunthea

 

Angkorean artefacts are displayed during a ceremony at the Cambodia National Museum in Phnom Penh July 18, 2010. Seven Angkorean artefacts which were illegally smuggled into the United States over the years were returned during the ceremony. REUTERS/Chor Sokunthea