Vice Admiral Barry McCullough On 31 July 2008 (deputy chief of naval operations for integration of resources and capabilities) and Allison Stiller (deputy assistant secretary of the navy for ship programs) stated that "the DDG 1000 cannot perform area air defense; specifically, it cannot successfully employ the Standard Missile-2 (SM-2), SM-3 or SM-6. It is not clear if the Standard Missile capability will be integrated into the Zumwalt-class destroyer or not.