Bush emphasized creating a personal relationship with Russian president Vladimir Putin in order to ensure harmonious relations between the U.S. and Russia. After meeting with Putin in June 2001, both presidents expressed optimism regarding cooperation between the two former Cold War rivals. After the 9/11 attacks, Putin allowed the U.S. to use Russian airspace, and Putin encouraged Central Asian states to grant basing rights to the U.S. In May 2002, the U.S. and Russia signed the Strategic Offensive Reductions Treaty, which sought to dramatically reduce the nuclear stockpiles of both countries. Relations between Bush and Putin cooled during Bush's second term, as Bush became increasingly critical of Putin's suppression of political opponents in Russia, and they fell to new lows after the outbreak of the Russo-Georgian War in 2008.