1. Means that a lot of money for Houston came from the Pentagon (Washington) 2. Yes 3. Yes (refers to the fire coming out of the rocket 4. Could. But Payroll usually means money, money coming in. Payload would mean crew and/or things on the rocket. 5. yes. 6. Your question 2... Kennedy slipped in his saying on purpose. The speech should have said "firing the largest payload"... but Kennedy used 'payroll' instead (play on words, they both sound similar). He used it on purpose to make a point, that being they would launch the largest payload, it would cost a lot. So it would be the biggest payroll too! So when he said payroll the first time, he used it instead of 'payload' on purpose... but to add a joke later, he used payroll again.

Both could be correct, depending on the situation. If you were asking if someone was leaving the place that you both are, you could use both. Both "go" and "leave" would mean the same thing. But, if say, you were working on a project, and you wanted to know their next step maybe, you could ask "will you go from here" meaning, will you continue on from this point? But you couldn't use "leave" in this situation.

I've seen it both ways, "L" and "el". Stands for "elevated railroad". In Chicago, they use "L"... in other cities they use "el" more. Hope this helps.

I've even heard "by any and all means necessary". "by any means necessary" could mean: get the task completed how ever you can, using any way possible (that you want) "by all mean necessary" could mean: get the task completed using every available resources. But, you could use them interchangeable if you like.