1.   Senior U.S. officials have even raised the possibility of withdrawing from the accord if the Russians refuse to agree to modify the treaty.

2.   Slocombe said the administration believed that Moscow would eventually agree to modify the treaty, clearing the way for the United States to deploy the missiles.

3.   Today, Clinton agreed to modify the treaty to give Russia more time to destroy warheads and silos as needed to comply with START II.

4.   But the United States wants to modify the treaty so it can build a limited defense against attack by rogue states, such as North Korea.

5.   Russia had pushed unsuccessfully for the treaty to be modified before NATO expansion.

6.   The Bush administration wants to scrap or heavily modify the treaty, which prohibits development of national missile defense systems.

7.   The Bush administration wants to scrap or heavily modify the treaty, which prohibits development of national missile defense systems by either Moscow or Washington.

8.   The United States says it wants to modify the treaty to allow defense against new kinds of threats.

9.   Washington has long tried to convince Russia to modify the treaty, which prohibits national missile defense systems.

10.   At the same time, NATO has put forward proposals to modify a treaty governing conventional forces in Europe.