Two suicide attacks in four days, one in the heart of Moscow Dec. 9 and the other in southern Russia near Chechnya, have Russians worried that a new wave of terrorism is underway. The attack in Moscow occurred outside the historic National Hotel opposite the Kremlin and Red Square, and killed six. Officials believe the Duma, the lower house of parliament, was the target. The attack on a commuter train in the Stavropol region four days earlier killed 44 people. Both atrocities are being blamed on Chechen terrorists, but no one has claimed responsibility for either.