FILE - U.S. President Bill Clinton raises his glass to toast with Russian President Boris Yeltsin at a dinner reception in Moscow's Kremlin Hall of Facets, May 10, 1995. Busy with political and economic crises that followed the 1991 collapse of the Soviet Union, Russian President Boris Yeltsin paid little attention when Poland, Hungary and the Czech Republic joined NATO in 1999. (AP Photo/Alexander Zemlianichenko, File)