Roman Tsars were also called caesar. One way they underestimated their own ruling is that they thought they were <span>Invincible</span>, which wasn't true. They started concentrating on other things, and not on ruling and military. That resulted in rebellions and invasions.
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The Roman Empire fell because it messed with Germanic tribe for years. The Germanics were tired of this and a group a barbarians(Goths) approached the Roman Empire and took over. The romand were also suffering from financial crisis from constant wars.
Strike ended when federal troops were involved. Set an important precedent. Companies appealed to the courts for help (injunction). Government usually supported the opposition to union and continued for the next 30 years. Read more on Brainly
NASA HQ are in Houston, Texas. Famous quote "Houston we have a problem" from Apollo 13 relates to it.