AMSTERDAM (Reuters) - A British Airways flight from Berlin to London has made an unscheduled landing at Amsterdam's Schiphol airport as a security precaution, the airline says. The aircraft was escorted by two Dutch air force F-16 fighter planes after the pilot requested the landing, officials said. "At the moment there are no more details of the specific threat," BA spokeswoman Sophie Greenyer said. "All passengers have disembarked and have been taken to a part of the airport for security screening." Authorities were also checking the plane, flight 983, police said. Schiphol, one of Europe's busiest international airports, is on...