Why did the engineers need to design a sunshade for Mercury Messenger?

Based on the evidence in the excerpt above, describe in your own words what it would have been like for a person to enter a meat processing plant in the united states

Which level of consumer had access to the smallest apply of energy

All vaccination should(n’t) be mandatory! 1.at least 5 sentences explaining 2.why? 3.in the end summarize the sentence