North Korea is reopening to tourism, but U.S. citizens still are not permitted to travel there.
The U.S. State Department bans the use of U.S. passports for travel to, in or through North Korea, claiming there is a "continuing serious risk of arrest and long-term detention of U.S. nationals."
The ban was imposed in 2017, following the death of Otto Warmbier, an American who spent over a year in a North Korean jail and returned to the U.S. in a comatose state. It has been regularly renewed since then, with the State Department's most recent Level 4 advisory being reissued last summer.