The Defense Department is reevaluating plans to restart a demonstration in October of a large blimp designed to watch for incoming cruise missiles, according to the Obama administration's nominee to lead U.S. Northern Command. "I understand the Department of Defense is considering whether to proceed with the JLENS operational exercise," Air Force Gen. Lori Robinson told the Senate Armed Services Committee April 21 , using shorthand for the Joint Land-Attack Cruise Missile Defense Elevated Netted Sensor. Robinson was referring to...