121. Duck.

By many, on account of its propellant used, the ET.

CENTER SEGMENT | Гү EAS ШЕН 1. ІШІ [D T1 T i W AFT ATTACH RING AFT SEGMENT WITH NOZZLE (12.38 FEET) I- 3.8 METERS Solid Rocket Boosters. Figure 2-16.—Separation of Space Transportation System (STS) (fig. 1-1) for space.