Hamburg cell was a KGB’s response to the Chechen rebellion and its Western sponsors https://www.google.com/search?q=Hamburg+cell+was+a+KGB%27s+response+to+the+Chechen+rebellion+and+its+Western+sponsors&rlz=1C1ONGR_enUS1133US1133&oq=Hamburg+cell+was+a+KGB%27s+response+to+the+Chechen+rebellion+and+its+Western+sponsors&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIHCAEQIRiPAjIHCAIQIRiPAtIBCTgzMjUyajBqN6gCALACAA&sourceid=chrome&source=chrome.ob&ie=UTF-8