How hard were they looking for a gun? They asked if I had a gun, then a knife, then about pepper spray. When I said I had a knife and I showed them a plastic knife for spreading Mayo, The female agent became angry and completely emptied the Explorer on the parking lot, pulled the spare tire out , looked at the air cleaner and delayed us an hour and half. I asked if she wanted to look behind the Texas license plates, she said "I felt behind them."
It was ironic, when I came back across two weeks later the US Customs Agent was in a drive by window and asked if I was a US citizen, and when he saw my wife asked "is she a US citizen?" never even asked for an I.D.
While I was in Canada I collected washrack grit to see if there was any Radioactive contamination, and had it shipped to our lab in Oklahoma by a Canadian Express carrier, The samples (listed as soil samples) never arrived and an inquiry a month later was returned they were confiscated at the Canadian, US border. It was declared that it is illegal to export Canadian soil to the USA! Maybe Trump should check on that in his trade talks.