Thank you much to Hal Weise for contributing this great photo of U. S. Army Cobra helicopter pilots from the "Lobos" - D Company, 227th Assault Helicopter Battalion, 1st Cavalry Division - goofing around in their off time in Vietnam. Frank McWhirter is below Hal and to Ron's right.
An interesting website with information on helicopter and air crew losses during the Vietnam War is at http://www.vhpa.org/heliloss.pdf The Vietnam Helicopter Pilots Association website is at http://www.vhpa.org/