NEW : `` His extraordinary talent and music was mixed with big dose of tragedy in private life . PM Putin : Much agreement in `` well-intentioned , substantial '' talks . Medvedev cites respect for Iranian people , shared history that transcends competition . Obama is in Obama for two-day summit with President Obama , Obama . Obama , Medvedev sign `` joint understanding '' on cutting nuclear arsenals .
NEW : PM Putin : Much agreement in `` well-intentioned , substantial '' talks . Medvedev cites respect for Iranian people , shared history that transcends competition . Obama is in Obama for two-day summit with President Obama , Obama . Obama , Medvedev sign `` joint understanding '' on cutting nuclear arsenals .