CIA: Attacks May Come From TrucksMissile Threat Still LingersPosted: 9:10 p.m. EST March 11, 2002 Updated: 10:18 p.m. EST March 11, 2002 WASHINGTON -- A CIA official said terrorists are more likely to use a truck than a missile to launch attacks on the US. But Robert Walpole told a Senate committee Monday that the missile threat is still greater than it was quot;during most of the Cold War.'' Walpole believes the threat will continue to grow quot;as the capabilities of potential adversaries mature.'' Walpole said there are several advantages to weapons delivered without missiles. He said they are quot;are...