SPIN BOLDAK: Despite a crackdown involving tens of thousands of troops and a pledge by President Gen. Pervez Musharraf to do all he can in the hunt for Osama bin Laden, Afghans say a steady stream of Taliban and al-Qaeda fugitives are finding a safe haven on Pakistan’s side of the 2,000-mile border. The Afghan border chief gestures toward a fresh spray of bullet holes across his pickup truck, then points toward the place he says the Taliban attackers came from: Pakistan. “See the trees? They started from that border post,” said Palawan, his head shaved. Afterward, “the vehicles came...