The head of the U.S. Border Patrol says his agency is hampered by its inability to put up permanent checkpoints on roads in southeastern Arizona. David Aguilar told a Senate hearing Thursday that no similar prohibition exists in other border states, but appropriations provisions have required that all checkpoints be temporary and be moved every two weeks in Arizona. Critics say permanent checkpoints, which force motorists to pull off roads leading away from the border for inspections, disrupt trade and traffic. But Aguilar said they have proven effective in other states. Congressman Jim Kolbe, R-Ariz., is behind the provisions that...