A 72-hour state of emergency began Sunday night, and the government said it would set out to find the killers, kidnappers and other violent criminals that it reported escaped from prison. At least nine people had been killed since Thursday — four of them police officers — as gangs stepped up co-ordinated attacks on state institutions in Port-au-Prince, including the country's international airport and the national soccer stadium. In the space of less than two weeks, several state