What an experience on an ex CAI ticket. Firstly make sure you have cash ready for the visa on arrival (otherwise you withdraw Egyptian pounds at an ATM). Secondly I was questioned at LHR at the gate by DHS trying to understand why a Brit is going to the US through CAI. Wanted to understand ties to Isis etc too! Then when I get to the US and go through global entry I get the dreaded X. Normally this just means a reprint of finger prints and you’re on your way. No, here they close the global entry line and escort me to a waiting room for further questioning. I wait 20 minutes and I’m questioned again. luckily that only lasted a couple of mins and they saw I wasn’t a possible suspect, but I had to give my home address, telephone number and address in the US. I was then on my way. I don’t think I’ll do ex CAI again in a hurry!