Former astronaut and U.S. Senator John Glenn's casket is seen as he is laid to rest at Arlington National Cemetery in Virginia on Thursday, April 6, 2017, the day on which he and his wife Annie were married in 1943. Glenn was the first American to orbit Earth on Feb. 20, 1962, in a five-hour flight aboard the Friendship 7 spacecraft. In 1998, he broke another record by returning to space at the age of 77 on the Space Shuttle Discovery. Photo Credit: (NASA/Aubrey Gemignani)
Marine Corps pallbearers lower the casket of former astronaut and U.S. Senator John Glenn at his interment at Arlington National Cemetery in Virginia on Thursday, April 6, 2017, the day on which he and his wife Annie were married in 1943. Glenn was the first American to orbit Earth on Feb. 20, 1962, in a five-hour flight aboard the Friendship 7 spacecraft. In 1998, he broke another record by returning to space at the age of 77 on the Space Shuttle Discovery. Photo Credit: (NASA/Aubrey Gemignani)
A Marine Corps honor guard holds the American flag over the casket of former astronaut and U.S. Senator John Glenn, who was buried with full military honors, at Arlington National Cemetery in Virginia on Thursday, April 6, 2017, the day on which he and his wife Annie were married in 1943. Glenn was the first American to orbit Earth on Feb. 20, 1962, in a five-hour flight aboard the Friendship 7 spacecraft. In 1998, he broke another record by returning to space at the age of 77 on the Space Shuttle Discovery. Photo Credit: (NASA/Aubrey Gemignani)
A Marine Corps honor guard holds the American flag over the casket of former astronaut and U.S. Senator John Glenn, who was buried with full military honors, at Arlington National Cemetery in Virginia on Thursday, April 6, 2017, the day on which he and his wife Annie were married in 1943. Glenn was the first American to orbit Earth on Feb. 20, 1962, in a five-hour flight aboard the Friendship 7 spacecraft. In 1998, he broke another record by returning to space at the age of 77 on the Space Shuttle Discovery. Photo Credit: (NASA/Aubrey Gemignani)
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)
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)
A horse drawn caisson carries former astronaut and U.S. Senator John Glenn to his final resting place during the interment ceremony at Arlington National Cemetery on Thursday, April 6, 2017 in Virginia. Glenn was the first American to orbit Earth on Feb. 20, 1962, in a five-hour flight aboard the Friendship 7 spacecraft. In 1998, he broke another record by returning to space at the age of 77 on the Space Shuttle Discovery. Photo Credit: (NASA/Aubrey Gemignani)
A horse drawn caisson carries former astronaut and U.S. Senator John Glenn to his final resting place during the interment ceremony at Arlington National Cemetery on Thursday, April 6, 2017 in Virginia. Glenn was the first American to orbit Earth on Feb. 20, 1962, in a five-hour flight aboard the Friendship 7 spacecraft. In 1998, he broke another record by returning to space at the age of 77 on the Space Shuttle Discovery. Photo Credit: (NASA/Aubrey Gemignani)
A horse drawn caisson carries former astronaut and U.S. Senator John Glenn to his final resting place during the interment ceremony at Arlington National Cemetery on Thursday, April 6, 2017 in Virginia. Glenn was the first American to orbit Earth on Feb. 20, 1962, in a five-hour flight aboard the Friendship 7 spacecraft. In 1998, he broke another record by returning to space at the age of 77 on the Space Shuttle Discovery. Photo Credit: (NASA/Aubrey Gemignani)
Marine Corp pallbearers carry former astronaut and U.S. Senator John Glenn to be laid to rest at Arlington National Cemetery in Virginia on Thursday, April 6, 2017, the day on which he and his wife Annie were married in 1943. Glenn was the first American to orbit Earth on Feb. 20, 1962, in a five-hour flight aboard the Friendship 7 spacecraft. In 1998, he broke another record by returning to space at the age of 77 on the Space Shuttle Discovery. Photo Credit: (NASA/Aubrey Gemignani)