Lockheed Martin announced Thursday that it would close the Sikorsky helicopter plant in the Coatesville area — near Chester County Airport in Valley — with the loss of some 240 local jobs. Not surprisingly, many of the elected officials who brokered a deal to keep the plant open in 2019 expressed anger and frustration at the decision — including U.S. Rep. Chrissy Houlahan (D-6), who fought to...