An FM radio station in San Diego (101.5), currently playing the classic rock format. This is significant because the FCC has not handed out three-letter call signs since the earliest days of commercial broadcast radio. If you stop using one, you lose it. Thus, KGB was used on an AM station owned by the same company (now part of the Clear Channel Communications empire) for many years, all the way through the Cold War. It's impressive that the Red Scare did not prompt the station's owners to request a new call sign, especially with the heavy military and defense industry presence in the city.