Panel Discussion Army Chief of Staff Army Gen. James McConville, Chief of Naval Operations Adm. Michael Gilday, Air Force Chief of Staff Gen. David Goldfein and Marine Corps Commandant Gen. David Berger take part in a fireside chat at the Reagan National Defense Forum at the Ronald Reagan Presidential Library in Simi Valley, Calif., Dec. 7, 2019. SHARE IMAGE: Download Image: Small (0 KB)| Medium (0 KB)| Full Size (4.8 MB) Photo By: David Vergun, DOD VIRIN: 191207-D-UB488-002.JPG Photo Gallery