Ironically, Night was the final piece that convinced me it didn't happen. The dude won a Nobel peace prize for his work against holocaust denial, yet his memior of two death camps (why do so many prisoners claiming to have been sent to a death camp also claim to have been transferred to other death camps?) doesn't even mention the poison showers. Instead, he claims people were thrown into a big flaming trench that was kept burning all day, during a fuel shortage.