The crew at Wings and Rotors Air Museum in Murrieta think it's high time Vietnam veterans get their due. Museum volunteers and military veterans have restored two Vietnam War-vintage helicopters and are working to return an F-4 Phantom jet to the skies. Those helicopters will fly and be on display today and Sunday at the March Field Airfest at March Air Reserve Base. "The Vietnam era is not well-represented at air shows," said Shayne Meder, an Air Force veteran, who paints and restores aircraft and works at Wings and Rotors. "People see World War II airplanes and modern airplanes. But...