The Helsinki conference began in 1973 and the Agreement was signed in 1975. Carter was president from 1977 to1981. Although Carter strongly supported the Helsinki Agreement, he was not responsible for it and had nothing to do with the Soviets signing it. It wasn't until the late 1980s, years after Carter's presidency, that Jews were able to leave the Soviet Union, and only in 1990 that they began leaving by the thousands.
Islamic State destroys part of Syria's Temple of Bel, monitoring group says (Reuters)
from the article: Carter in Syria: Israel must fully lift Gaza blockade