PRAGUE, August 10, 2006 (RFE/RL) -- The British authorities are in no doubt -- after an operation lasting several months, the security services have foiled an imminent terrorist attack. British Home Secretary John Reid said the security services had raised the threat level from "severe" to "critical," the highest possible level, which, according to the website of MI5, the British Security Service, means an attack is expected soon. "The police, with the full knowledge of ministers, have carried out a major counterterrorism operation to disrupt what we believe to be a major threat to the United Kingdom and international partners,"...