C-130-E in flight cruising

C-130-E in flight over Vietnam 1972 probably at about 10,000 feet altitude. We were not flying in some kind of planned formation … just basically sneaked up on buddies in other aircraft. Although there was air traffic control (ARTC) in Vietnam (Invert was one) it was very relaxed especially during enroute segments of the flight. Often flew visual flight rules VFR while avoiding thunderstorms where as always all eyes in cockpit on lookout for other aircraft traffic especially when advised by ground control of other planes in the area.