That would be an incredably difficult thing to accomplish even under the best of situations. Those going there must be very proactive in maintaining their safety. Unfortunately, the ones being kidnapped for the most part are unaware of that need nor have the additional support to deflect most kidnap attempts.
I teach a fair number of folks how to defend themselves with a handgun. After I go through my list of awareness tips (listed on the main page of the TM) I always caution all my students that in the event of a worse case scenario, in that you get taken unawares and are overcome, if you are conscious, you must do whatever it takes to avoid being forced into a vehicle. If this happens you are likely raped (if female) and murdered. NEVER get in the car! No matter what you have to do, don't get in that car. Especially if the perps are terrorists. They are unlikely to put you into the trunk of a vehicle without searching you. I say this because it has happened in the past where nutcases have kidnapped women and dumped them into a car trunk where the victim retained control of her .38sp snubnose revolver. When her "rapist" opened the trunk to collect his "goodies" he got sent to his just reward with five bullets center mass of the chest. This is unlikely to happen in a case of terrorist kidnapping.
This means, if you are armed open fire. Do not "double tap!" Everybody get's "firsts" before anybody get's "seconds!" Start with whomever is closest OR whomever is most heavily armed. If you carry a gun, carry at least one reload. I always carry two. Don't stop until the threat is neutralized or you run out of ammo. Don't get into the car, under any circumstances!
If you're not armed....Don't get into the car! This means it's going to get a bit scarier and more dangerous. Probably life threatening. Make your decision now--is it worth it to sacrifice your life if you get to choose the place, time and method? Meaning you get this choice: Die fighting for freedom or die helpless as you await the beheading that is sure to befall you in the case of a terrorist act.
Also you must commit yourself to truly brutal actions. If you are unarmed, let somebody get close. It doesn't matter if they're armed. Your first strike must be guaranteed to not only debilitate the target, it must be brutal and bloody enough to literally shock the others for a moment. Long enough for you to get hold of a gun and open up. I can't tell you what to do, it is situational in nature. Ram a finger into an eye socket deep enough to make the eyeball explode (sorry to be graphic Donna Lee Nardo) or ram a fist into the throat such that it shatters the adams apple--better if you can actually rip the Adams Apple from the throat. Also consider ripping off an ear. This is easier than it sounds. Just do not allow yourself to be forced into a vehicle against your will!