What is normally the third contact of the ball when it comes over the net?

Why is it useful for historians to base certain studies on the analysis of historical periods

Why didn’t the united states participate in the league of nations? the u.s. senate did not want the country to join. president wilson did not want the country to join. the league of nations was only for european countries. the league of nations had failed to prevent world war 1

What issues are reporters presently working to expose and reform?