NEW : Joseph Picklo allegedly tried to carry ` ` an explosive device on a plane '' TSA : Police found explosive , flash powder in a man 's car . Federal official says there are no early indications of terrorism . Picklo was stopped by TSA agents before boarding a flight for San Fransico .
NEW : Joseph Picklo allegedly tried to carry `` an explosive device on a plane '' TSA : Screeners find fireworks , flash powder in a man 's backpack . Federal official says there are no early indications of terrorism . Picklo was stopped by TSA agents before boarding a plane for San Fransico .