Hambleton switched from the Strategic Air Command to the Tactical Air Command and was assigned to the 42nd Tactical Electronic Warfare Squadron in Korat, Thailand as a navigator. The 42 TEWS was equipped with EB-66C/E Destroyer aircraft that flew radar and communications jamming missions to disrupt enemy defenses and early warning capabilities. On his 63rd mission, on April 2, 1972, Hambleton was a navigator aboard an EB-66C gathering signals intelligence, including identifying enemy anti-aircraft radar installations, to enable jamming. The aircraft was helping escort a cell of three B-52 bombers tasked with attacking entrance passes to the Ho Chi Minh trail. While just south of the DMZ and immediately north of Quang Tri at about, the aircraft was destroyed by a Soviet-built SA-2 Guidelinesurface-to-air missile. Hambleton was the only one of the three-man crew able to eject. He parachuted into the middle of the North Vietnamese Easter Offensive and landed in the midst of tens of thousands of North Vietnamese soldiers. His eventual rescue from behind enemy lines was the "largest, longest, and most complex search-and-rescue" operation during the entire Vietnam War. Hambleton had received water survival training at Homestead Air Force Base, Florida, and escape and evasion training and survival basics at the Pacific Air Command Jungle Survival School in the Philippines. During the rescue operation, five aircraft were shot down, 11 airmen were killed in action, and 2 were captured. Nine additional aircraft and helicopters were badly damaged during the rescue attempts. General Creighton Abrams finally ordered that no further air rescue operations should be attempted, but ordered a ground rescue operation. Hambleton was a USAF ballistic missile expert with a Top Secret/SCI clearance and his capture by the North Vietnamese Army would have been of tremendous benefit to them and the Soviet Union. Hambleton said after the war that he felt sure if he were captured that he would never have been taken to Hanoi. Hambleton was finally rescued after days by Navy SEAL Lieutenant Thomas R. Norris and VNN commando Nguyen Van Kiet in a covert, night-time infiltration behind enemy lines. Norris was awarded the Medal of Honor and Nguyen the Navy Cross. Nguyen was the only South Vietnamese naval officer given that award during the war. Hambleton was awarded the Silver Star, the Distinguished Flying Cross, the Air Medal, the Meritorious Service Medal and a Purple Heart during his career.
Death
Hambleton died on September 19, 2004, in Tucson, Arizona, at age 85. The cause of death was pneumonia related to lung cancer, according to a family member.
In popular media
The story of Hambleton's evasion and rescue was told in the 1980 book, Bat 21, written by Air Force Colonel William Charles Anderson. This was followed by the dramatic 1988 film, Bat*21, starring Gene Hackman as Hambleton and Danny Glover as a forward air controller. A second book, The Rescue of Bat 21, based on a large amount of declassified information, was written by Col. Darrel D. Whitcomb and published in 1998. Whitcomb was a decorated pilot and from 1972 to 1974 a forward air controller based in Southeast Asia.