 The Dal-Tex building is located across the street from the Texas School Book Depository.Sitzman's boss, Abraham Zapruder, arrived at work that morning without his 8 mm movie camera as he decided not to film the motorcade because it was raining that morning.By mid-morning, the rain had cleared and Zapruder's secretary Lillian Rogers encouraged him to go home to retrieve his camera to film the motorcade.