www.astronautmemorial.net

Anchor text: In Memoriam – Lt. Col. Virgil Ivan "Gus" Grissom (USAF)

Wikipedia: Gus Grissom

Anchor text: Clifton C. Williams Jr. quotation

Wikipedia: Clifton Williams

Anchor text: McKay page at Astronaut Memorial

Wikipedia: John B. McKay

Anchor text: Edward Givens' quotation

Wikipedia: Edward Givens

Anchor text: Theodore C. Freeman's quotation

Wikipedia: Theodore Freeman

Anchor text: Major Edward Galen Givens, Jr. (USAF)

Wikipedia: Quiet Birdmen