Merck entered an agreement with American Industrial Acquisition Corp. (AIAC) to sell its manufacturing facility in Arecibo, PR, which was scheduled to close. AIAC will retain the approximately 200 Merck employees at the Arecibo facility.   AIAC is a U.S.-based industrial group comprised of 60 manufacturing sites in 18 countries, and has $1.5 billion in annual revenues. The group was built over the last 18 years by acquiring, operating and growing former divisions and subsidiaries of leading corp...