In the early 1980s, punk concerts increasingly became sites of violent battles between police and concertgoers, particularly in Los Angeles, but also in San Francisco. Henry Rollins argued that in his experience, the police caused far more problems than they solved at punk performances. At one point, Black Flag was under heavy surveillance by police convinced that the band was the cover for a drug ring. Cities like Sacramento, Lake Tahoe and neighboring Reno, Nevada followed San Francisco and Los Angeles, creating their own underground hardcore scenes. Local promoter Stuart Katz brought punk rock to Sacramento in the early 1980s starting off with shows in auditoriums at McKinley Park. Katz eventually opened Club Minimal in South Sacramento, booking early hardcore acts such as Black Flag, Circle Jerks, Flipper, Crucifix as well as local bands. The police department shut down the club, but Katz led a 60s style peaceful protest inside the lobby of City Hall, joined by more than a hundred punk rockers. The protest made the cover page of the Sacramento Union. Nardcore is a hardcore punk movement that originated in the Oxnard suburbs of Silver Strand Beach and Port Hueneme. Early bands of the nardcore scene include Agression, Dr. Know, False Confession, Ill Repute, Habeas Corpus, Stalag 13, RKL and Scared Straight. Around 1977, the first group in the area was a Moorpark band called the Rotters, emulating the new sounds of English punk rock. After playing a few parties for high school age audiences, Agression latched onto the style. The younger, future members of Dr. Know and Ill Repute were in the audiences saying "Oh, we can do that." The first venues to regularly host punk shows in the Oxnard area were Casa Tropical (a Quonset hut at the Oxnard Airport), Town and Country (Port Hueneme), Skate Palace (Port Hueneme), and Casa de la Raza (Santa Barbara). The local Skate Scene played heavily in the scene, many people riding in backyard half pipes or breaking into backyards with empty pools to skate. "We were all skaters before we were punkers," said Brandon Cruz, singer for several Nardcore bands. There was and still is a strong sense of unity and community among the generations of Nardcore bands. Some unity came from the coverage by a local publication called "60 Miles North", which began in 1983 initially as a xeroxed flyer for an Alley Cats concert in nearby Camarillo.