Ted Gundy was in his teens when he fought at the Battle of the Bulge in 1944. He had been selected for the role of sniper after reporting to his unit in Belgium just before the German attack that would become the Battle of the Bulge, and he provided sniper cover for his rifle company during the battle.
At 86 years-old, Gundy heard about modern snipers hitting shots at over 1,000 yards and decided he wanted to take a shot at that range. He contacted Shooting USA — which set up the event on his behalf — getting him an invitation to shoot at Fort Benning with a sniper team from the Army Marksmanship Unit that has won two international sniper competitions.
Gundy takes three shots at 300 yards with a replica of his 1903 Springfield A-4 Sniper Rifle from the war before taking another three shots at 1,000 yards with a more modern rifle. (If you just want to see the longest shots, skip to 6:10 in the video below).
Shooting USA has the full story behind the event with Gundy here.