A lone soldier standing guard in a deserted city alley, on high alert for any signs of danger#soldier #guard duty #deserted city #high alert #military #urban warfare #war #usa

A group of armed militia members moving through an abandoned city block, on high alert for danger#militia #armed #urban #danger #abandoned city block #war #usa

Illustrate the arms race and tension between countries that possess nuclear weapons, showing military installations and missiles on high alert#nuclear weapons #arms race #military installations #missiles #tension #nuclear weapon #atomic bomb