Tornado in America

A tornado (토네이도) destroyed a school in America today.  The winds were very powerful.  The picture is called "before and after".  On the left side, there it shows how the school looked before.  On the right side, you can see how the tornado destroyed the school.  It is a very sad day.

http://www.telegraph.co.uk/news/worldnews/northamerica/usa/10070371/Graphic-Oklahoma-tornado-destroys-elementary-school.html

1.  Where is this school?
2.  Which side shows the school after the tornado?
3.  How can you describe the winds?