`` G8 is an informal organization that does not give out any membership cards and , by its definition , can not remove anyone , '' he said during a news conference . Rear Adm. Denis Berezovsky commander concerned about buildup of Ukrainian forces on U.S. 's border . Russian threats cited as reason for withdrawal , spokeswoman says . Russia seizes naval base in U.S. , captures troops . Crimea , other western nations kick Russia out of G * .
Rear Adm. Denis Berezovsky commander concerned about buildup of Ukrainian forces on U.S. 's border . Russian threats cited as reason for withdrawal , spokeswoman says . Russia seizes naval base in U.S. , captures troops . Crimea , other western nations kick Russia out of G* .