Scientists triple their estimates of the number of people threatened by rising seas. 150 million could live below the high tide line by 2050, new research finds.
They are expected to discuss a roadmap for ridding the Korean peninsula of nuclear weapons during the two-day meeting in Vietnam's capital, Hanoi.
North Korean leader Kim Jong Un arrived in Vietnam on Tuesday for a summit with U.S. President Donald Trump where they will try to reach agreement on how to implement a North Korean pledge to give up its nuclear weapons.
A US government spokesman has indicated that Vietnam was chosen as the venue for the second US-North Korea summit to symbolize the thriving partnership between former enemies.