There's been cases of people trying to use "air cannons", sometimes mounted out of modified vehicles, to send drugs over the border: https://www.cbp.gov/newsroo

There's been cases of people trying to use "air cannons", sometimes mounted out of modified vehicles, to send drugs over the border: https://www.cbp.gov/newsroom/local-media-release/2-teens-face-prosecution-air-cannon-smuggling-attempt https://www.cbp.gov/newsroom/local-media-release/2-teens-fac... but I'm more endeared by the fact that the state of the art in short-range ballistic drug transport is looking more and more like the IRA's improvised mortars (up to and including mounting them in modified vans): https://en.wikipedia.org/wiki/Barrack_buster https://en.wikipedia.org/wiki/Barrack_buster