A U.N. treaty to regulate the multibillion-dollar global arms trade will have to wait after member states failed to an reach agreement. Some diplomats and supporters blamed the United States for the unraveling of the monthlong negotiating conference. Hopes had been raised that agreement could be reached on a revised treaty text that closed some major loopholes by Friday's deadline for action, but the U.S. announced Friday morning that it needed more time to consider the proposed treaty.