A spent M18 smoke grenade hidden inside a modified aerosol container passed through initial security screening at Watertown International Airport in upstate New York before Transportation Security Administration officers discovered it in late September.
The grenade was found in a carry-on bag during routine X-ray screening. TSA Officer Yessenia Alvarez flagged the aerosol container because its appearance seemed suspicious. Lead TSA Officer Melissa Graffam examined the X-ray image, noticed the container's top looked abnormal, and opened the bag to find the device in a side pocket.
When questioned, the passenger claimed he had forgotten the smoke grenade was in his bag. Graffam found the explanation questionable given how few items were packed. A TSA explosives expert later confirmed the grenade was inert.
According to TSA records, spent, inert and replica explosive devices are explicitly prohibited from carry-on and checked baggage. Federal officials say these items can cause operational disruptions and trigger law enforcement responses. Yet this particular grenade made it past initial security screening, requiring an officer's suspicion and manual inspection to intercept it.
The discovery is not isolated. At Tampa International Airport, TSA officers uncovered a 4-inch double-edged knife concealed inside a flashlight shaped like a baseball bat during routine X-ray screening by Officer Andrew Carter.
The methods used to hide such items—hollowing out innocuous objects and modifying containers—suggest passengers attempting to breach security are engaged in deliberate deception rather than casual forgetfulness.
TSA federal security director Brian Bushnell urged travelers to check their bags before departure and consult TSA.gov before packing. Critics say this framing places responsibility on individual passengers rather than addressing whether the screening process is sufficient to catch determined concealment attempts without relying on officer intuition.
Keith Jeffries, a former federal security director for TSA at Los Angeles International Airport and current vice president of K2 Security Screening Group, warned that people should not attempt to test the system, implicitly acknowledging that some people are trying to discover gaps and exploit procedural vulnerabilities.
The cases demonstrate that airport security's multiple layers—X-ray imaging, officer training, explosives detection and law enforcement coordination—can work when all function together. But each layer depends on the one before it. Breaking any link allows contraband to advance further than it should.
The incidents confirm that officer vigilance matters. However, they do not explain what systemic failures enabled the concealment attempts in the first place or how often similar items successfully pass through undetected.
