There is no doubt that the Pakistanis will have an investigation, but don't expect that it will be "legitimate" in the way you might like. Their goal is to figure out if anyone will lead the US government right back to them (a smoking gun of guilt). If past is a guide, they may be willing to pin the blame on a few people, place them under house arrest. But they will not allow US government to interrogate or have access.
More generally, yes, this will send relations between Washington and Islamabad downhill. I'm sure we can get into more details as this chat goes on. But US-Pak relations were already in crisis before Bin Laden...
As for Afghanistan, this is clearly influencing perspectives of people back here in the States. Those who thought the war was more trouble than worth think so even more.



