The 1920 Wall Street bombing in New York City killed 38 people with an advanced bomb detonated on a horse and wagon parked across from J.P. Morgan & Co . Historians believe Galleanist Mario Buda to be the bomber , as revenge for the indictment of Sacco and Vanzetti , his friends . Buda possibly had experience with dynamite from work in Michigan . The Wall Street explosion was timed for noon , a busy time of day . An extortionist leaflet found nearby demanded the release of political prisoners
Wall Street bombing
Wall Street bombing
Galleanists