The U.S. and Israel today announced the start of a new collaborative weapon system project: Arrow-4, a "next-generation" guided-missile interceptor -- a project neither previously disclosed by the Missile Defense Agency nor explicitly authorized by Congress -- that aims to improve the Missile Eastern nation's ability to defeat both endo- and exoatmospheric threats. MDA and the Israel Missile Defense Organization, in separate statements, revealed the new project which is designed to modernize the Arrow Weapon System's two currently fielded interceptor...