Answer:
Finding the latitude and longitude of Mexico city is very simple. You only have too find the nearest latitude marker, which is 20 degrees North, and the nearest longitude marker, which is 100 degrees West. From there, in any sufficiently large physical map, or more commonly, in a visual map software, the more specific coordinates can be found.
In the case of Mexico city, the exact latitude is 19.4 degrees North, and the exact longitude is 99.1 degrees West.
Two of the main reasons for Truman's policy of containment during the Cold War were that the USSR was trying to rapidly expand, and that eliminating communism where it already existed was extremely unlikely. It was considered a very effective policy originally but then was viewed with skepticism when Vietnam hit.
I believe you're looking for the Missouri Compromise.
Exodus is the second book