On the night of February 16, 1970, Brian McDonnell was sorting through bulletins on the Teletype machine at Park Police Station in the Upper Haight neighborhood of San Francisco. The respected 44-year-old sergeant was checking results from the recent union elections, in which he was running for station representative. Steady winter rain fell outside. At 10:45 p.m., a bomb planted on the ledge outside a... More >>>
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The voice-activated trigger is shown in this FBI evidence photo from the Weather Underground safe house.