that flight from seseattle to l angeles was delayed for about 30 minutes. >> abc 7 news at 5:00 beginsight now with cheryl and dan. >> fired somewhere between 65 and e7 5 rounds. >> tonight, the search for a motive. new evidence pointing towards terrorism. >> a new question, police discover a massive stockpile of weapons. we're live with team coverage. >> live doppler 7 hd is still cracking showers. we'll let you know how long you need to hang on to the umbrella. >> they could have continued to do another attack. >> the mass shooting could have been much worse. a husband and wife pulling the trigger again and again. something experts say has never happened in the united states. >> the amount of armor that he's had, ammunition. we know that. we d do not know why. >> and that is the big question tonight, what is the mostive for this shooting. thanks for joining us. >> here's the latest. a u.s. official says the f.b.i. is treating the shooting as a potential act of terrorism. >> reporting on one of the suspects why he had contact with people who were on the f.b.i.'s radar because of poten