CAMBRIDGE, Massachusetts, June 14 -- The Union of Concerned Scientists issued the following news release: The governors of Illinois, Maryland, New Jersey and Pennsylvania sent a letter to the PJM Interconnection president and board of managers chair yesterday, urging the grid operator to promptly facilitate a process for states, PJM, and stakeholders to engage in long-term planning to expand transmission, as per a new Federal Energy Regulatory Commission (FERC) directive. Prior to the issuance  more