By BASSEM MROUE, Associated Press Writer BEIRUT, Lebanon – Following Lebanon’s third bombing in eight days, President Emile Lahoud pledged Sunday to fight the violence gripping his country since last month’s assassination of former premier Rafik Hariri. Saturday’s blast at an industrial property in the mainly Christian northeastern suburb of Bouchrieh injured five people and set at least six factories ablaze. The attack followed bombings on March 19 and March 23 that targeted two Christian strongholds, killing three people and wounding at least 10. “We will do all we can. We should all be united because this is how we can save the country,” Lahoud, a Maronite Christian and close Syrian ally, vowed after attending Easter Mass.