we don't have to use those as a matter of fact it wasn't designed that way initially at all the solid uh propellant rockets were a uh you know were time saving money saving afterthought
We don't have to use solid rocket propellants.
Solid rocket propellants are the most expensive rocket fuel.
Hiker on a mountain
The Ottoman Empire crumbled.
The man is plowing the driveway.
There are 50 people around
Thebes was flourishing when the Romans arrived.
The man is standing in the shadows.