[USS Virginia, underway in July 2004. The Virginia class, or the SSN-774 class, is a class of nuclear-powered attack submarine with cruise missile capability in service with the United States Navy.]

As reported by the New York Times:

In a social media post, the president described the move as a deterrent prompted by threats by a former Russian leader. It is unclear if any submarines did actually change position.

Trump’s threat comes five days before the 80th annual commemoration of the U.S. atomic bombing of Hiroshima, Japan, and eight days before the 80th annual commemoration of the atomic bombing of Nagasaki.

Last December, the Nobel Peace Prize was awarded to Nihon Hidankyo, the largest organization of Hibakusha, survivors of the atomic bombings, who have worked for many decades to prevent nuclear war and abolish nuclear weapons.