The preamble of the new nuclear arms pact with russia cites an " interrelationship " between offensive and defensive strategic weapons , and opponents argue this could block the us from moving forward with its european missile defence programme , making it a key obstacle to ratification .

美俄新裁核条约的序言提到了进攻性与防御性战略武器的“相互关系”，反对批准该条约的人士认为，这一表述可能会阻止美国推进其欧洲导弹防御计划它由此成为该条约获批的主要障碍之一。