I have sympathy for the man, but any westerner who would enter Pakistan at the moment has to be aware of the risk. If he chose to take that risk to further some meritorious goal, then all the more to praise him. Having said that, although the U.S. should certainly use all means at its disposal to secure his release, they should not pay a ransom or free any prisoners in exchange. Israel has shown the folly of that sort of misguided compassion. Subsidize terror and you will get more terror.