New gym opens with Murph challenge Published June 2, 2022 By Staff Sgt. Jessica Avallone 374th Airlift Wing Public Affairs YOKOTA AIR BASE, Japan -- Yokota hosted a Murph challenge for the opening of a new box gym May 27. The U.S. Olympic & Paralympic Committee donated a high-performance box gym to Yokota Air Base during the 2020 Olympic games.