Overview

• Michael Gann, 55, was indicted July 22 in the Southern District of New York and faces up to 40 years in prison on explosives charges.
• Investigators allege he assembled at least seven improvised explosive devices with online-purchased chemicals.
• Authorities say he hid bombs on a SoHo rooftop and threw one onto the Williamsburg Bridge subway tracks, endangering commuters.
• His indictment includes counts of attempted destruction of property by explosives, transportation of explosive materials and unlawful possession of destructive devices.
• The FBI, NYPD and the SDNY’s National Security and International Narcotics Unit credited swift interagency cooperation for preventing any casualties.