The 5 biggest stories around the military right now (July 17 edition)

• Gunman kills 4 Marines at military site in Chattanooga
• From Tenn. to Times Square, military recruiting centers prove easy targets
• A history of attacks against US military installations
• Trump would end ‘gun free zones’ on military bases
• Bill requires retired military service dogs to come home

Now: This ill-fated PR flight kept the B-70 Valkyrie from changing Air Force history