After seeing a soft drink can with a false bottom meant to hide valuables, Aguilera began looking around for other hiding places disguised as food. The fake sandwich opens like a wallet, with zippered compartments in each slice of bread designed to hide cash or credit cards. Aguilera puts a piece of sheet explosives and a detonator in one slice and sends it through security.

“In a sandwich bag, it looks like a sandwich going through,” he said.

When Aguilera was asked how often these test explosives get through, TSA spokesman Mike England leaned in and said, “We can’t talk about test results. That’s classified.”