Partly because of the pressure from Boeing, in the summer of 2003, Northrop Grumman formed an alliance with Lockheed Martin to help develop the "X-47B", a follow-on to the X-47 that would compete against Boeing efforts. The alliance, which repeats the successful teamup that won the F-35 Joint Strike Fighter effort, is focused on building a modular stealthy UCAV that could be adapted to a wide range of missions. It would have a speed of Mach 0.8 at 10,670 meters (35,000 feet) and endurance of up to 12 hours. The goal of the J-UCAS effort is to select a single contractor to provide from 10 to 12 machines for operational evaluation in the 2007-2008 time frame. Current plans are to obtain two X-45Cs and two X-47Bs to perform a comparative evaluation and then select a winner for development in the 2010 time frame. Specifications for the J-UCAS are still evolving. Right now, both services envision a stealthy machine with a pricetag of $10 to US$15 million, which is actually modest for a sophisticated stealthy combat aircraft. The USAF envisions that J-UCAS will feature:   The USAF has envisioned an operational UCAV as being stored in broken-down form inside a container that can be airlifted, with the UCAV having a specified "shelf life" of 20 years. It would be removed from the container every few years for inspections and could be checked with an electronic test system. The Air Force would also like to use an operational UCAV as the basis of a "penetrating jammer" platform that would penetrate enemy airspace to blind hostile radars. It would replace the Grumman EA-6B Prowler manned electronic warfare aircraft in this role. A reconnaissance payload is also being considered. However, the Air Force wants to focus on the strike role first. Over the long term, the Air Force is interested in using a UCAV as a platform to carry directed-energy weapons, initially a "high power microwave (HPM)" weapon to fry adversary electronic systems. The HPM weapon would be "fired" out an aperture on the front of the aircraft, with electronic steering used to direct the beam over an arc covering about 45 degrees to either side of the UCAV. The HPM weapon could be followed by a high power laser weapon. The Navy is interested in many of the features on the Air Force wish list, though the Navy has put reconnaissance and jamming at the top of the list and strike at the bottom, and seems to be indifferent to the containerization concept.