The Pakistani police have again come under fire today after yesterday’s deadly wave of attacks.At least 11 people have been killed in Peshawar in a suicide car bomb attack on a police station. At least 13 other people were injured in the sixth attack in 12 days against the police, which after yesterday’s carnage in the Punjab refocussed attention on the northwest, where the army is preparing a ground offensive it called “imminent” today. Overnight Pakistani forces intensified their artillery bombardments and air strikes in the Ladha, Makeen and Shahoor areas in Waziristan, where 28,000 troops are massed to take on an estimated 10,000 Taliban fighters. Also overnight Pakistan got a shot in the arm as President Barack Obama signed a seven and a half billion dollar aid bill, but only after Islamabad received last-minute congressional assurances it came with no strings attached. Many Pakistanis fear a loss of sovereignity if cash is tied to fighting a civil war.