Two months after announcing Major General Jay Hood would become the senior American officer based in Pakistan, the Pentagon has quietly canceled the assignment. Hood, a 33-year army veteran, was excoriated in the Pakistani news media for one of his previous jobs: commander of the United States prison at Guantánamo Bay, Cuba. The withdrawal of Hood's assignment has not been announced, but it reflects the widening shadow that the military prison at Guantánamo is casting over American foreign policy.