U-2, the legendary spy plane used during the Cuban missile crisis in 1962, is now monitoring the situation in North Korea.
Tensions continue to soar in the Korean peninsula and the US is now concerned that its combative approach to the situation may have exacerbated the crisis.
Meanwhile, North Korea issued a warning to the UK saying they could not guarantee the safety of British diplomats after April 10 in the event of a conflict.
Through her tears, a North Korean woman told me how she had to escape: risk death while running across the border or die of starvation.
Memories of the Korean war are never far away in South Korea, where residents have grown used to living with the constant threat of war.
North Korea said it will withdraw workers from the Kaesong factory park run jointly with South Korea and suspend all operations there.