KINGS BAY, Ga. (Sept. 28, 2021) Principal Director of Nuclear Matters, Office of the Secretary of Defense, Ms. Casey Deering, is briefed in the control space aboard the Ohio-class ballistic-missile submarine USS Tennessee (SSBN 734) by Commander, Submarine Group Ten Rear Adm. John Spencer (center) and Blue crew commanding officer Cmdr. Justin Kaper (right), during a familiarization visit to Naval Submarine Base Kings Bay, Georgia Sept. 28, 2021. The base is home to all East Coast Ohio-Class submarines. (U.S. Navy photo by Mass Communication Specialist 1st Class Ashley Berumen)