Pakistan is angry with the US over a NATO air strike that killed at least 24 of its soldiers last week.
While the US has expressed its condolences, President Barack Obama will not issue an apology until after a full investigation into the incident has taken place.
Pakistanis are furious - saying that the NATO mission, which the US took part in, violated its sovereignty. It has responded by closing key supply routes to Afghanistan and ordering the CIA to vacate a Pakistani airbase from where US drones are launched.
Al Jazeera's Patty Culhane reports.