Edwin drake drill was created to drill for oil deep in the ground eventually people discovered that they could also drill for water what powered these drills

the term is einsatzgruppen

during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.

google it and it will pop up