In May 1993, AFA members at Seattle-based Alaska Airlines were facing a 30-day cooling-off period after more than three years of negotiations. In June, 1993, the cooling-off period mandated by the Railway Labor Act had expired. The first CHAOS strike took place in Seattle when three flight attendants walked off an Alaska Airlines flight just before passenger boarding. A month later, another crew of flight attendants struck the last flight out of Las Vegas. A few weeks later, AFA struck five flights simultaneously in the San Francisco area.