Officials at Auschwitz are criticizing a congressman for making a video inside a gas chamber at the notorious Nazi death camp. Louisiana Republican Clay Higgins says in the video that the horrors of Auschwitz illustrate why it's important that the U.S. military be, as Higgins puts it, "invincible." The memorial and museum tweeted that the gas chamber is "not a stage," but a place for mournful silence. More than a million people, mostly Jews, died during World War Two at the camp in Nazi-occupied Poland. A sign outside the gas chamber instructs visitors to "maintain silence" inside the building.