15 April 1969 (Korean time) marked the final flight of a Navy VQ-1 EC-121/WV-2 callsign Deep Sea 129. Roughly 100 nm off the North Korean peninsula.
North Korea not only acknowledged the shoot down, they loudly and boastfully celebrated their action. President Nixon suspended maritime patrol flights in the Sea of Japan for three days and then allowed them to resume, only with fighter escorts. No reparations were ever paid to the US or the families of the lost airmen.

02-09-1943-lt-john-h-singer-ec-121b
The crew of Deep Sea 129:
LCDR James H. Overstreet, LT John N. Dzema, LT Dennis B. Gleason, LT Peter P. Perrottey, LT John H. Singer, LT Robert F. Taylor, * LTJG Joseph R. Ribar, LTJG Robert J. Sykora, LTJG Norman E. Wilkerson, ADRC Marshall H. McNamara, CTC Frederick A. Randall, CTC Richard E. Smith, * AT1 Richard E. Sweeney, AT1 James Leroy Roach, CT1 John H. Potts, ADR1 Ballard F. Conners, AT1 Stephen C. Chartier, AT1 Bernie J. Colgin, ADR2 Louis F. Balderman, ATR2 Dennis J. Horrigan, ATN2 Richard H. Kincaid, ATR2 Timothy H. McNeil, CT2 Stephen J. Tesmer, ATN3 David M. Willis, CT3 Philip D. Sundby, AMS3 Richard T. Prindle, CT3 John A. Miller, AEC LaVerne A. Greiner, ATN3 Gene K. Graham, CT3 Gary R. DuCharme, SSGT Hugh M. Lynch,(US Marine Corps) [* Recovered]

Burial:
National Memorial Cemetery of the Pacific
Honolulu, Hawaii
Plot: MA23-G