The area at Kent State University where four students were killed by National Guard troops has been made a national historic site in time for the 40th anniversary of the shootings.
It was on May 4, 1970 that Guard members opened fire on a student protest of the Vietnam War at the northeast Ohio school. Nine people were wounded. The section of campus where it happened was formally added to the National Register of Historic Places on Monday, and the university also dedicated a new audio walking tour of the site.
Later, people holding candles took turns all night marking the spots where the students died. At 12:24 p.m. Tuesday - 40 years to the moment when Guard members fired - a bell was to be rung 13 times in memory of all the students who were shot.