What new inventions

to preserve the

health of americans?

Explanation:

1.  Healthcare Education: Augmented Reality

Education needs a revamp, and even more so healthcare education.  Doctors are put through a gauntlet of requirements before they even see the light of day (AKA a paycheck) and this leads to supply issues.  Currently, it is estimated that the United States needs 96,000 more doctors just to meet the current needs.

So how does it get better?

Through robust 3D training tools offered by companies like 3D4Medical which helps doctors learn about Anatomy without having to cut open a cadaver.

a.tensions between the colonial elites and the backcountry men of virginia.

the spanish  

hope this meaning spain btw