VENEZUELA'S crippling strike has entered its seventh week amid renewed violence and warnings by President Hugo Chavez he would strengthen military efforts to end the action that has throttled the vital oil industry. In what has become an almost daily routine, police and National Guard troops fired tear gas and rubber bullets to disperse protesters in Caracas and the country's second largest city, Maracaibo. Yesterday it was Chavez supporters who were targeted by security forces - in Caracas after they hurled rocks at government opponents, injuring at least two people, and in Maracaibo as they tried to stage a protest...