Actually, what Mad said is true. Sure, you can write thirty pages on essentially anything, but there's a difference between writing thirty pages and writing thirty good pages. Anyone can write thirty pages of nonsense or simple reporting--hell, a lot of people seem to think researched papers are nothing more than reporting facts! He's got to actually prove something, even if it's something rather self-evident. For instance, if his thesis was, "The Apollo progamme was a direct response to the Soviet's successful space programme," then that's way too broad. But trying to address something like why did the U.S. space progamme take such a huge leap forward from the Gemini missions to the lunar landing despite being behind the Soviets the rest of the way and a major accident setback (i.e. Apollo 1), then that's perfect.