LAX Security Line

I dropped off my parents at LAX this morning for their trip to Toronto. They usually never fly American Airlines but since I still had some miles on my account, I use it to get them 2 one-way tickets; they're flying Air Canada on the way back. I dropped them off at around 8:10am at terminal 4 and they didn't get through security until 9:40am. I did see lines on the sidewalk for both terminal 4 and 5 as I drove away but wasn't sure if this was the new wait due to underwear-bomber or if there was some specific event this morning. 90 minutes to go through security... sigh.