TBILISI, Georgia -- A grenade hurled into a crowd during last week's speech by U.S. President George W. Bush in the Georgian capital was live and considered a threat, though it failed to explode because of a malfunction, the FBI said yesterday. Georgian officials initially said the Soviet-era grenade was inactive. But FBI agent Bryan Paarmann said that the grenade, wrapped in a dark handkerchief, fell about 30 metres from the podium where Bush was speaking.