It was in Alaska. Greenland was a stop for aircraft going to the European Theatre. Alaska was a stopover for aircraft going to the Pacific Theatre.
B-29s only fought in the Pacific (with the exception of two B29s that flew through Europe, on their way to India, to scare Hitler.)
Ok, I knew that B29’s were used exclusively in the Pacific but the way it looked from the video I could have sworn that they mentioned Greenland - which to me was an oddity - however, didn’t some B29’s go to England after WWII at the start of the Cold War????