9 out of 10 times I get a simple stamp. Today we got the initials "AH"....which sent us over to a secondary search of our luggage. The customs agent had to look the code up to see what it meant ( didn't tell me) but he kept asking if we had any food products. ( we didn't)

I know that immigration makes the initial decision as to the level of your suspicion and search when you first enter the US but I was curious if anyone knows what some of these initial codes mean that they put on your form during the quick interview.