>>Well, as he was flying in a cargo plan, I doubt there would be any restrictions one what he could carry

Don't count on it, there was an attempted hijacking of a FedEx plane some years ago. A pilot who'd been passed over for promotion smuggled a hammer on board (he was flying in the jumpseat). His intentions were to kill the Captain, First Officer and Flight Engineer, then ram the plane into the Fed Ex Head Office (located at the airport). (This was years before 9/11, btw.) His first blow paralysed the Captain, causing permament disability; his second hit the First Officer as he turned to see what the commotion was. It ended with the First Officer (badly injured) and the Flight Engineer wrestling with this nutcase while the Captain, in terrible pain and unable to move one arm, called in a Hijack/Mayday and brought the plane around for one of the most incredible landings ever pulled off. (Realizing he was too high to make the intended runway, he put the plane into a 90 degree banked turn at less than 1000 feet altitude, lined up with the crossing runway and managed to bring the plane to a safe landing.)

The would-be hijacker basically had the book thrown at him -3 counts of attempted murder, 3 counts assault with a deadly weapons, attempted hijacking, attempted extortion, endangering the safety of an aircraft in flight (which, surprisingly, is probably the most serious charge, as it carries a possible death sentence in the US and a possible life sentence even in Canada). I forget what his sentence was, but it was enough that he'll never see his kids except through a pane of bullet-proof glass for the rest of his life.

I believe, sadly, that none of the three pilots ever returned to active flying, due to their injuries.