In his annual address to the Federal Assembly on 26 April 2007, Putin announced plans to declare a moratorium on the observance of the Treaty on Conventional Armed Forces in Europe by Russia until all NATO members ratified it and started observing its provisions, as Russia had been doing on a unilateral basis. Putin argues that as new NATO members have not even signed the treaty so far, an imbalance in the presence of NATO and Russian armed forces in Europe creates a real threat and an unpredictable situation for Russia. NATO members said they would refuse to ratify the treaty until Russia complied with its 1999 commitments made in Istanbul whereby Russia should remove troops and military equipment from Moldova and Georgia. Russian Foreign Minister Sergey Lavrov was quoted as saying in response that "Russia has long since fulfilled all its Istanbul obligations relevant to CFE". Russia has suspended its participation in the CFE as of midnight Moscow time on 11 December 2007. On 12 December 2007, the United States officially said it "deeply regretted the Russian Federation's decision to 'suspend' implementation of its obligations under the Treaty on Conventional Armed Forces in Europe (CFE)." State Department spokesman Sean McCormack, in a written statement, added that "Russia's conventional forces are the largest on the European continent, and its unilateral action damages this successful arms control regime." NATO's primary concern arising from Russia's suspension is that Moscow could now accelerate its military presence in the Northern Caucasus.