Huge military presence at Super Bowl 50

The event was crawling with security guards, police and military of all shapes and sizes, including imposing camouflaged Humvees with roof gun mounts, troops in fatigues holding automatic rifles and jet-black Homeland Security assault vehicles circling the perimeter. Helicopters circled above and police checkpoints intercepted any car attempting to approach the stadium. At one point, near the media entrance to the event, a column of military personnel could be seen marching into the interior of the stadium security zone, boots clomping, weapons in hand. [...] as fans wandered around in full regalia prior to the game, throwing footballs, buying souvenirs and engaging in friendly banter with opposing factions, another team of uniformed attendees kept a watchful eye on the proceedings, weapons in hand, keeping a nervous peace.