Since 1996, 14 Americans have been detained in North Korea.
Here's who they are and how long they were held:
Kim Dong Chul, 30 months
Kim Hak-song, 12 months
Kim Sang Duk, 12 months
Otto Warmbier, 17 months *returned in a vegetative state, died days later
Kenneth Bae, 24 months
Matthew Todd Miller, seven months
Jeffrey Fowle, five months
Merril Newman, about two months
Eddie Yong Su Jun, about six months
Aijalon Mahli Gomes, about seven months
Robert Park, fewer than two months
Laura Ling, about five months
Euna Lee, about five months
Evan Hunziker, three months
In addition, a number of American servicemen have also been detained in North Korea following the end of the Korean War in 1953. The crew of the USS Pueblo was held after their ship was captured 50 years ago (they've since sued the North Korean government.) Two American soldiers defected to the North and are believed to be held after their initial crossings. James Dresnok and Charles Jenkins both crossed the heavily militarized border separating the two Koreas in 1962 and 1965, respectively.
Dresnok was thought to be the last remaining American soldier in the country before his sons revealed last year that his father had died. Jenkins returned to the US in the early 2000s and was dishonorably discharged and spent fewer than 30 days in jail. He died in December.