Simplify the following text for a Grade 14 native English-speaking person.
Original: The Virginia Tech massacre was a school shooting incident on April 16 , 2007 , which took place at the Virginia Polytechnic Institute and State University , a college in Blacksburg , Virginia , United States .
Simplified: The Virginia Tech massacre was a school shooting that took place on Monday , April 16 , 2007 , on the campus of Virginia Polytechnic Institute and State University in Blacksburg , Virginia , United States .