1.   America and Russia have long agreed that it would violate the ABM treaty to pour concrete for missile-tracking radars the treaty prohibits.

2.   But the ABM treaty expressly prohibits such a system.

3.   Negotiated by the Reagan and Bush administrations, the treaty prohibits the use, stockpiling, purchasing, production and development of poison gas.

4.   No East-West treaty prohibits tests of anti-satellite arms in space.

5.   The ABM treaty prohibits either Russia or the United States from building more than one missile defense system.

6.   The ABM treaty prohibits the United States and Russia from deploying any nationwide system intended to shoot down incoming ballistic missiles.

7.   That treaty prohibits the United States from building any system designed to shoot down intercontinental ballistic missiles.

8.   The treaty prohibits the testing and deployment of long-range missile-killing systems that are based on ships, airplanes or in space.

9.   The treaty had prohibited such a test.

10.   Ahead of the summit, speculation lingered that the leaders might actually split the eight-year mandate of the bank chief, which the EU treaty specifically prohibits.