Changes

{{expand}}In the winter of 1990–91, [[Nine Inch Nails]] embarked on their second headlining North American tour. The tour is part of the [[Pretty Hate Machine Tour]] series. Opening acts for this tour were [[Related bands and artists#Chemlab|Chemlab]] and , [[Related bands and artists#Die Warzau|Die Warzau]]Grotus, Fixed Image, Sweat Engine and Ethyl Meatplow.