Grace Chiu on Facebook:
Some chalk (magnesium carbonate) at the gym got on the top of my photo booth kit bag and set off CSTA alarms for traces of explosive chemicals at YYG. Forms got filled out and everything got hand checked, including my body. I’ll be happy to get home soon to do some laundry.
Leave a comment if you’ve ever heard of gymnastics chalk being flagged at an airport. That stuff is about as inert as any substance.
Gymnastics Coaching.com 