In the wee hours of the morning on March 1, 1971, a disturbing phone call came in to the Senate telephone switchboard. A man “with a hard low voice” told the operator that the U.S. Capitol would blow up in 30 minutes.
In the past, operators had fielded similar threatening calls from time to time, but all of them had turned out to be false alarms or pranks. This one, however, would be different.
