The Air Force trainee who killed three and injured eight when he opened fire at a naval base in Florida assailed the United States as 'a nation of evil' before he went on his shooting rampage, AFP reports. The man, first identified by NBC News as Saudi national Mohammed Saeed Alshamrani, opened fire inside a classroom at Naval Air Station in Pensacola early Friday morning. Police quickly responded to the scene and he was shot dead. US officials, who spoke on condition of anonymity to discuss an ongoing investigation, said the suspect was a second lieutenant attending the aviation school...