(Reuters) - Bristol-Myers Squibb Co on Thursday said it plans to spend $250 million to expand its Devens, Massachusetts, facility that makes large-scale biologic drugs. The company said the expansion will introduce biologics development and clinical trial manufacturing capabilities to the site and add about 350 employees to the Devens workforce over time. Work on the expansion, which will include the construction of two new buildings, is expected to begin in late 2013 and be completed in 2015. ...