See if you can spot the armed camouflaged Marine watching you

Effective camouflage can be the difference between life and death in a combat situation. And for US Marine Brent Downing, camouflage is also an art. An expert in camouflage techniques, Downing runs a YouTube segment called the "Camouflage Effectiveness Series" in which he documents techniques from militaries around the world.

Downing's ability to hide in plain sight is amazing. We have compiled screenshots from some of his videos below. See if you can see him, because he sees you.