FBI links PA storage unit to ISIS-inspired plot near NYC mayor's home

FBI investigators found explosive residue in a Pennsylvania storage unit tied to an ISIS-inspired incident outside Gracie Mansion, the NYC mayor's residence; two Bucks County teens, Ibrahim Kayumi and Emir Balat, face federal charges for allegedly possessing and conspiring to use a weapon of mass destruction, transporting explosives and aiding a designated foreign terrorist organization. Surveillance video obtained by NBC News shows Balat buying a 20-foot fuse in Pennsylvania days before the incident, and authorities conducted a controlled detonation of some components; no injuries were reported in the attack outside the mayor's home.