Christina Steel will finish building the skeleton of Regeneron Pharmaceuticals' 346,000-square-foot packaging plant next month in East Greenbush. The two-story "finish and fill" facility will position the drug maker to start loading some of its syringes in-house for the first time as the company continues to develop medications that treat eye disease, arthritis, asthma and other ailments. The project is part of the $800 million manufacturing complex Regeneron is constructing on 130 acres off Tempel...