U.S. Defense Secretary Robert Gates on Sunday called for partnership between the United States and Russia to address global concerns such as terrorism.
"One cold war was quite enough," he said at a high-profile security conference held at the southern German city of Munich.
The landscape of global security is changing and the transatlantic relationship needs to be "reoriented" to meet the current and upcoming challenges, Gates said.
"Russia does not need to fear law-based democracy," he added.
Gates' remarks came one day after Russian President Vladimir Putin condemned at the same meeting the United States for "almost uncontained" use of force, which analysts said showed a grave lack of mutual trust between the former Cold War rivals.
Washington's "almost uncontained" use of force has led other countries to seek weapons of mass destruction, including nuclear weapons, said Putin.
"We are witnessing an almost uncontained hyper use of force in international relations... The United States has overstepped its national borders in every way," the Russian president said.
Some 250 top officials from over 40 countries participated in the 43rd Munich security conference which will run from late Friday to Sunday.
The meeting was also attended by German Chancellor Angela Merkel, NATO Secretary General Jaap de Hoop Scheffer and EU foreign policy chief Javier Solana.
The Munich security conference, entitled "Global crisis, global responsibilities", will also highlight NATO's role, the Middle East peace process, transatlantic relations, the West's relations with Russia and the fight against international terrorism, according to the organizers.