tried to pass through customs with six metal boxes containing two 9mm pistols, 250 bullets, two swords, and 11 daggers, a security official at the Cairo International Airport told Al-Masry Al-Youm. “Mohamed Ibrahim Khalf, a professor of botany at a US-based school, was transferred to a state security prosecutor for further investigation,”
"A feller could have a pretty good adventure in the jungle with all that stuff..." - Indiana Slim Pickens
But there would be lots of paperwork, permits, and a heads up from JFK to the Egyptians.
The Egpytian officials obviously were caught by surprise and would not have detained him if all was legit and done in the open.
BTW, one report has it that a number of weapons were in secret compartments in the luggage, possibly a carry on.