Declan Walsh in The Guardian:
The deal was struck between the military leader General Pervez Musharraf and President George Bush after Bin Laden escaped US forces in the mountains of Tora Bora in late 2001, according to serving and retired Pakistani and US officials.
Under its terms, Pakistan would allow US forces to conduct a unilateral raid inside Pakistan in search of Bin Laden, his deputy, Ayman al-Zawahiri, and the al-Qaida No3. Afterwards, both sides agreed, Pakistan would vociferously protest the incursion.
“There was an agreement between Bush and Musharraf that if we knew where Osama was, we were going to come and get him,” said a former senior US official with knowledge of counterterrorism operations. “The Pakistanis would put up a hue and cry, but they wouldn't stop us.”
The deal puts a new complexion on the political storm triggered by Bin Laden's death in Abbottabad, 35 miles north of Islamabad, where a team of US navy Seals assaulted his safe house in the early hours of 2 May.
Pakistani officials have insisted they knew nothing of the raid, with military and civilian leaders issuing a strong rebuke to the US. If the US conducts another such assault, Prime Minister Yousaf Raza Gilani warned parliament on Monday, “Pakistan reserves the right to retaliate with full force.”
More here.