Celebrity Showdown Celebrity chef Robert Irvine challenges a Marine in the middle of performing a cooking demonstration during the Chairman’s USO Holiday Tour at Morón Air Base, Spain, Dec. 21, 2017. DoD photo by Navy Petty Officer 1st Class Dominique A. Pineiro SHARE IMAGE: Download Image: Full Size (0.71 MB) Photo By: Dominique A. Pineiro VIRIN: 171221-D-PB383-052.JPG Photo Gallery