From 3 to 4 hours max
Mexico has a long border and a lot of cities near the border, but it would take about 19-20 hours to get from Jefferson City, Missouri, to Juarez, Mexico, which is right on the border of Texas and Mexico.
Closest city would be Juarez, Mexico. Distance is 1021 km (635 miles) over a 11-hour, non-stop drive.
That depends on where you start from and how you travel.
As safe as anywhere else within reason. B. I actually just got back from Mexico and as long as you go to a more tourist place such as mazatlan or Puerto Vallarta you should be fine, but just don't go to Juarez there is a lot of shootings and the police are very corrupt there. Just be careful and don't get caught in the wrong place.
Mexico touches the Caribbean; hence time/distance is zero.
This depends on how fast you travel.
Hitler is Scary
He served five terms as president of Mexico: 1858-1861 as interim, 1861-1865, 1865-1867, 1867-1871 and 1871-1872, with a total office time of 14 years.
It depends on your starting and ending points, as well as the mode of transportation. For example, if you are going from San Diego, CA to Tijuana, Mexico, it will take you a 5-minute walk to reach Mexico. If you are traveling from Newark, NJ to Mexico City by plane, it will take a 5-hour flight to reach Mexico.
As long as you have an American passport, you can enter Mexico. Problem is on your way back to the US. Without a valid proof of citizenship, you will not be abe to return to US soil.
The flight will take 2h 41min. I used the travel calculator online (TravelMath).