Soviet inspectors' presence at Monday's scheduled destruction of Pershing missiles in Colorado shows "real disarmament" in action, a Soviet official said. The 10 inspectors arrived Sunday to oversee the destruction of 18 Pershing missile motors outside Pueblo. The first two were to be destroyed Monday afternoon, weather permitting. "People can now face the future with optimism," Anatoly Samakin, the Soviets' chief inspector. Under terms of the Intermediate-range Nuclear Forces treaty, the United States has two years to destroy 450 Pershings; in turn, the Soviets will destroy a larger number of their intermediate-range missiles.