NPR's Michele Kelemen reports from Moscow that the Russian military has vowed to do whatever necessary to wipe out Islamic rebels who, they believe, have staged incursions into the southern republic of Dagestan and the recent spate of apartment house bombings. The Russians say the rebels are based in the breakaway republic of Chechnya. Russian jets have been pounding suspected strongholds there and deploying troops along Chechnya's borders. Russian military officials are also suggesting they may have to send a substantial ground force into Chechnya. But many Russians fear their leaders have not learned the lessons of the last, disastrous Chechen war.