You may have a better name than concentration camp for this kind of mass detention, shown in a photo apparently, released (for some reason) by the Department of Homeland Security. The scene above could be from any old concentration camp, as far as I can see. Pod 2, indeed.
Take a moment to consider that the word Homeland was never used to describe The (eh..) United States of America before the attacks of 9/11/01. Naomi Wolf pointed out the origin of the word in her Bush/Cheney era book warning about creeping fascism. The word was recycled by self-styled American patriots who got the idea from real fascists; the Nazis called their land die heimat.