One of CNN's regular legal commentators (in other words, not someone specially selected to address this case) says that it is legal under international law to seize a suspect like Bin Laden in another country if it can be shown that that country "is unable or unwilling" to extradite him or otherwise bring him to justice.

She suggested that the fact that Bin Laden had been living for years less than a mile from a military installation while Pakistan knew he was wanted internationally was prima facie evidence that Pakistan was unwilling or unable to deal with him.

I suppose that questions may still be raised (in theory) about how many of the shots actually fired by the Americans were "legal" or "illegal," but international law would seem to have been observed. As it is never observed by Al Qaida.

There is also the moral principle of choosing the lesser of two evils: invade one house in Pakistan for forty minutes or let Bin Laden plot ten thousand more deaths.

As far as I'm concerned, case closed.