"This morning, the sound of grenades woke us up," says a resident of one Caracas neighbourhood where security forces and criminal gangs have been clashing for two days, in an operation that has involved 2,500 uniformed officers. This is one of several suburbs in Venezuela's capital lorded over by criminals who terrorise locals largely unhindered in a country in dire economic and political straits. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES