LONDON -- Britain's national terror threat will remain at a severe level during the 2012 London Olympics, the country's national counterterrorism minister said Thursday. The current threat was raised to the second highest classification in January, meaning an attack is highly likely in Britain. To test the country's preparedness to cope with a major incident, a series of national counterterrorism simulations will be conducted in the run-up to the opening ceremony on July 27, 2012. "We must work on the assumption that (the threat) will remain as it is," counterterrorism and security minister Pauline Neville-Jones told an Olympic security conference....