The five bikes stolen included one custom-made for Staff Sgt. Matt DeWitt, who lost both arms below the elbow to a rocket-propelled grenade while serving with the Army in Iraq in 2003. DeWitt's bike, which police say is valued at $19,000, has controls that allow the double-amputee to shift with his knees and brake using his back. "No one else can really ride it," he said. DeWitt, who is visiting Alaska for the first time from his home in Weare, N.H., had only used the bike a few times before it went m issing.