My "friend" had been traveling internationally right after new years and had already gone through security twice and customs once at that point. They even used the little cloth swaps on that bag (a few times) that detect explosives. It went through at least 3 x-ray machines.

He was waiting to board his flight to Denver figured the safest thing to do was just to leave them in his backpack and take them out of the airport at his final destination where he could get rid of them at home.

My "friend" sure gave me lots of details.