Contact Made With Hostage-Takers in Russia BESLAN, Russia - Attackers wrapped in suicide-bomb belts raided a school in a region bordering Chechnya, seizing up to 400 hostages - including scores of students welcoming the new school year - and threatening to kill captives or blow up the building if it was stormed by encircling Russian troops.    Authorities established contact with the hostage-takers hours after the raid Wednesday, which officials said left at least two people dead in the latest assault in a country the defense minister said has been challenged by a declaration of terrorist war...