Yeltsin first suggested the summit at last June’s G-7 summit in Halifax. But it remained a fantasy until technical experts from the G-7 and Russia developed an agenda at a meeting early this month. “Everyone’s realizing just how urgent it is to get a handle on the loose-nukes issue,” says a U.S. official. Clinton is expected to sign a “presidential decision directive” ordering a stepped-up U.S. effort to help Russia safeguard its bomb-grade uranium and plutonium. His goal: to secure all major nuclear-storage sites in Russia and the other former Soviet republics by the end of 1996. The directive will call for $100 million in U.S. aid in ‘90, up from $10 million this year.