A plane exactly like this one did several go-arounds at Half Moon Bay Airport on February 21 between 1:30 and 2 p.m. The first one was wheels-up. The last three were wheels-down. At first I thought Surf Air might be coming to HMB, as it flies a similar Pilatus PC 12, but these look like US Air Force (USAF) markings. It seemed unusual and I'm curious if anyone has any input.