U.S. Secretary of State John Kerry and Vietnam's Deputy Prime Minister and Foreign Minister Pham Binh Minh pose for a photo before a signing ceremony at the Government Guesthouse as part of the visit by U.S. President Barack Obama in Hanoi, Vietnam May 24, 2016. REUTERS/Kham

U.S. Secretary of State John Kerry and Vietnam’s Deputy Prime Minister and Foreign Minister Pham Binh Minh pose for a photo before a signing ceremony at the Government Guesthouse as part of the visit by U.S. President Barack Obama in Hanoi, Vietnam May 24, 2016. REUTERS/Kham

U.S. Secretary of State John Kerry and Vietnam's Deputy Prime Minister and Foreign Minister Pham Binh Minh pose for a photo before a signing ceremony at the Government Guesthouse as part of the visit by U.S. President Barack Obama in Hanoi, Vietnam May 24, 2016. REUTERS/Kham

June 21, 2016 10:18 AM (UTC+8)