The United States and Russia signed the New START Treaty on April 8, 2010, and it awaits Senate consideration. The preamble to the Treaty contains a "provision on the interrelationship of strategic offensive arms and strategic defensive arms." This statement does not contain any limits on current or planned U.S. missile defense programs. However, some analysts have questioned whether Russia's threat to withdraw from New START if the United States expands its missile defense capabilities might have a "chilling effect" on U.S. missile defense plans and programs.