US aircraft carrier visits Vietnam in Southeast Asia power play.

The USS Ronald Reagan, a US aircraft carrier, is set to make a rare port call in Vietnam, marking only the third such visit since the end of the Vietnam War. The visit comes as both the US and China seek to bolster ties with Southeast Asian nations. Vietnam is seen as a key component of the US strategy for the region, while China is Vietnam's largest trading partner. The visit is part of a "normal friendly exchange for the sake of peace, stability, cooperation and development in both the region and the world," according to Vietnam's Foreign Ministry.