[CCIP]

As far as I know, El-Al have some sort of counter-SAM system installed on their airplanes. Otherwise, planes are symbolic targets - even if buses are more likely to actually be blown up, the in the public eye an attack on a plane, even partially successful, will always be rated as more outrageous. I think when people like the Iranian Republican Guard and organized terror groups are involved, there is pretty good chance they'll be properly trained in using these things. Don't underestimate these guys - they are often more professional than the average soldier.

Granted, I think the chances of a MANPADS attack on anything flying within the US are extremely remote at best. They'd be higher in Europe, but I would still be surprised seeing one of those pulled off. It's the other places, particularly Africa, where you're still the most likely to see these missiles actually used. But if you're not flying to one of those places, you don't have that much to worry about.