"Atlanta's Hartsfield Airport has just issued a warning--passengers are being told to pour out all liquids before boarding. This includes bottled water, cologne, contact lens solutions, lotion and hair gel."
Same here at Minneapolis-St. Paul Int'l. Airport security is also doing random vehicle searches.
Houston Bush Intercontinental is having a press conference right now - just standard stuff for this orange alert.
But one thing gave me a bit of a bother - the head of security who is speaking now says that there may be 4 flights in transit from London to Houston right now that have not been turned around - he doesn't know for sure. They left last night before this alert was announced at 4AM our time.