https://www.wsj.com/articles/get-ready-to-unpack-for-airport-security-1495640411
TSA has been criticized in the past for missing weapons in undercover government tests.
New procedures, such as requiring all food or all electronics larger than cellphones be placed in bins separately, are still being tested. Changes haven’t yet been finalized, but senior Transportation Security Administration officials agreed to discuss them publicly for the first time. Decisions will be made in a few weeks, with new rules implemented after the summer travel rush, once screeners are trained and announcements made.
Food can trigger lots of false alarms because of the density of some items. Chocolate, for example, can look like some types of explosives to X-ray machines.

