Following the Bolshevik Revolution in Russia, many Americans feared the possibility of a Communist-inspired revolution happening in the United States. Such concerns were inflamed by the anarchists bombings. These fears combined with a patriotic national mood, led to the "First Red Scare." Attorney General A. Mitchell Palmer convinced Wilson to delay amnesty for those who had been convicted of war-time sedition, and launched the Palmer Raids to suppress radical organizations. Palmer's activities met resistance from the courts and some senior administration officials. At the time, Wilson was still recovering from the stroke he suffered in late 1919 and did not intervene. The Wall Street bombing on September 16, 1920, was the deadliest terrorist attack on U.S. soil up to that point in history, validated Palmer's concerns in the eyes of many. Flyers found on the scene immediately prior to the bombing declared anarchist anger, and warned of more violence to come.