On Nov 23, 1944, a B-17 bomber came in for a landing at a British air force base in Belgium. There was no plane scheduled to land, nor did anyone communicate that one was coming. When it landed safely, the propellers kept on spinning for 20 min, but no one got out.

When a crew came to inspect the plane, there was no one on board and all the parachutes were accounted for. So who landed the plane?