An American college student who fell into a coma more than a year ago while detained by North Korea was returned to the U.S. Tuesday in a stunning display of diplomatic dexterity by the White House.

A military airplane carrying 22-year-old Otto Warmbier of Ohio landed in Cincinnati late Tuesday night. The 22-year-old was then taken by ambulance to the University of Cincinnati Medical Center.

Warmbier had been serving a 15-year prison term with hard labor for alleged anti-state acts in the reclusive North since he was sentenced by the regime in March 2016.