Following threats from a guerrilla group at war with the government, Colombia says it has strengthened security around the city of Cali as some 12,000 delegates from around the world are expected to attend the global biodiversity summit starting next week. But for residents, more needs to be done. "The guerrillas are doing whatever they want in this country," says one resident. "We have to take drastic measures now," adds another resident. IMAGES AND SOUNDBITES