The Soviet Union is allowing Voice of America, the U.S. government's radio service, to open its first Moscow bureau. U.S. officials said Wednesday that Soviet authorities have agreed informally to the request, which was made a year ago and renewed in informal talks at the recent summit in Moscow. "Soviet authorities have indicated informally that they will soon respond positively to VOA's request to open a Moscow bureau," said Beth Knisley, a spokeswoman for the radio service. The bureau would be VOA's first in Moscow.