Ellen Shields McCandless, wife of former NASA astronaut Captain Bruce McCandless II, USN (Ret.), left, pays her respects during her husband's interment service, Tuesday, Jan. 16, 2018 at the United States Naval Academy Cemetery in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)

Funeral service for former NASA astronaut Captain Bruce McCandless II, USN (Ret.), Tuesday, Jan. 16, 2018 at the United States Naval Academy Cemetery in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)

Funeral service for former NASA astronaut Captain Bruce McCandless II, USN (Ret.), Tuesday, Jan. 16, 2018 at the United States Naval Academy Cemetery in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)

Family and friends watch as the flag that draped the casket of former NASA astronaut Captain Bruce McCandless II, USN (Ret.) is folded during his interment service, Tuesday, Jan. 16, 2018 at the United States Naval Academy Cemetery in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)

The flag that draped the casket of former NASA astronaut Captain Bruce McCandless II, USN (Ret.) is presented to his wife Ellen Shields McCandless during his interment service, Tuesday, Jan. 16, 2018 at the United States Naval Academy Cemetery in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)

Interment service for former NASA astronaut Captain Bruce McCandless II, USN (Ret.), Tuesday, Jan. 16, 2018 at the United States Naval Academy Cemetery in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)

Taps is played during the interment service for former NASA astronaut Captain Bruce McCandless II, USN (Ret.), Tuesday, Jan. 16, 2018 at the United States Naval Academy Cemetery in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)

Funeral service for former NASA astronaut Captain Bruce McCandless II, USN (Ret.), Tuesday, Jan. 16, 2018 at the United States Naval Academy Cemetery in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)

Ellen Shields McCandless, wife of former NASA astronaut Captain Bruce McCandless II, USN (Ret.), left, is seen during her husband's interment service, Tuesday, Jan. 16, 2018 at the United States Naval Academy Cemetery in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)

The flag that draped the casket of former NASA astronaut Captain Bruce McCandless II, USN (Ret.) is folded during his interment service, Tuesday, Jan. 16, 2018 at the United States Naval Academy Cemetery in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)

Interment service for former NASA astronaut Captain Bruce McCandless II, USN (Ret.), Tuesday, Jan. 16, 2018 at the United States Naval Academy Cemetery in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)