 Other vital targets included key communications centers, research and development facilities for nuclear and chemical weapons, plus hardened aircraft shelters on Iraqi airfields.On the first night of combat operations, an F-117A dropped a 2000-pound laser-guided GBU-27 Paveway III bomb right through the roof of the general communications building in downtown Baghdad.In another attack on the communications building next to the Tigris River, another GBU-27 Paveway III was dropped through an air shaft in the center of the roof atop the building and blew out all four walls.