U.S. Secretary of State Mike Pompeo said the Trump administration was open to lifting sanctions and allowing private American investments into the reclusive state.
Pyongyang has asked Seoul to open a new international flight route.
Changing the time on the clocks is the first symbolic gesture from Pyongyang.
The two Korean leaders agreed last Friday to cease the launch of propaganda leaflets across the border.
South Korea operates a "finders keepers" law on lost and found property.
The U.S. Forces Korea hold regular military drills with the South Korean army.
Cho Hyun-min is daughter of Cho Yang-ho, chairman of Hanjin Group which owns Korean Airlines. She apologized in front of reporters in Seoul.
Kim Jong Un said it was painful to see the clocks in the summit room last week showing different times for the two countries.
President Donald Trump was quick to take credit for the historic summit.
Kim's younger sister was the only woman at at the summit table and assisted her brother by handing him a pen, holding flowers and taking notes.
Could this be the beginning of a reunited Korea?
Kim Jong Un and Moon Jae-In looked triumphant as they shared a hug and signed the Panmunjom Declaration.
Kim Jong Un and his sister Kim Yo Jong crossed the border line on Friday morning to hold talks with South Korean President Moon Jae-in.
North Korean leader Kim Jong Un will set his foot on South Korean soil for the first time, with his sister right behind him.
The Supreme Leader's need for a secret sandbox first emerged in 2015.
A spokesperson for the Japanese foreign ministry called the mango mousse featuring a unification flag "regrettable."
Senate committee hearing scheduled for Wednesday on Harris' Australian nomination has been postponed.
The potato rosti is a simple farmers' recipe considered to be one of Switzerland's most iconic dishes.
The loudspeakers were switched off for the first time in two years.
In exchange, Pyongyang wants security guarantees.
South Korean President Moon Jae-in and North Korean leader Kim Jong Un are scheduled to meet on April 27.
The man said he killed the dog because it would not be quiet.