GUESTS: PETER KENYON *NPR Congressional Correspondent The Comprehensive Test Ban Treaty is finally facing a vote in the senate. If ratified, the treaty would prohibit future nuclear testing. President Clinton says the ban would lock in American military superiority, but Senate majority leader Trent Lott calls the treaty 'dangerous.' The treaty currently faces an uphill battle; a rejection by the Senate would mark the first defeat of a major treaty proposal since the end of World War I. Join Melinda Penkava and guests for a look at the debate over the Comprehensive Test Ban Treaty.