The building at the center of this week’s Midtown scare is the former Pfizer world headquarters at 235 East 42nd Street: a 33-story tower built in 1960 that, alongside its neighbor at 219 East 42nd, is being converted by Metro Loft and David Werner Real Estate Investments into roughly 1,600 apartments, the largest office-to-residential conversion in U.S. history. On Tuesday morning, the FDNY recei...