When Alexius I Komnenoi implored the pope (Urban II) for help, he meant it to reconquer the lost Byzantine lands (and therefore return in to their de facto ruler, a.k.a., the Byzantines). Urban however, decided to merely use that as a façade in order to then invade the Muslims, and retake the holy land.
He also saw the wanted to unite Christianity as a whole (All the sects at the time, Orthodoxy, Catholicism, Paulicianism, Iconoclasts, etc. into a single conglomerate, fighting a common enemy.)
Answer:
The person that counts it is your State's House of Representatives or Senators. It also depends on population, the more populated your state is, then the more representatives your have, that is why it is important to do the United States Census.
The first rocket in space was a turning point in history because it inspired the space race, made the United States aware of the possibility of Russia creating rockets to deliver nuclear weapons, and created a reform in education.
There will probably be many new kinds of technology by 2028. One way people could be viewing digital videos is virtual reality. That technology already exists today, and could be improved a lot by then.