May 4 is the 41st anniversary of the shootings at Kent State University, an event that many argue brought the Vietnam War to American soil.
Troops from the Ohio National Guard killed four students and injured nine when they opened fire on a crowd of protesters at Kent State University in Kent, Ohio.
The protestors were gathering in the university's Commons area in response to President Nixon's announcement four days earlier that the United States would send troops into Cambodia, essentially widening the scale and scope of the Vietnam War.
The May 4 demonstration was the culmination of four days of protests. On May 2, demonstrators burned the university's Army Reserve Officer Training Corps (ROTC) building to the ground, a photo of which is included in the slideshow.
In the days following what became known as the Kent State Massacre, over 450 college campuses closed because of protests. And just five days later in Washington, D.C., between 75,000 and 100,000 people gathered outside the White House to demand the removal of American troops from Southeast Asia.
The slideshow below features photos from Kent State. What does this moment in history mean to you? Share your thoughts and memories in the comments below.
This Pulitzer Prize-winning photograph by John Filo shows 14 year-old Mary Ann Vecchio kneeling over the body of Jeffrey Miller after he was killed by Ohio National Guard troops on the campus of Kent State University on May 4, 1970.
Ohio National Guardsmen watch from a distance as students gather in the commons late in the morning of May 4, 1970. (Kent State University)
Ohio National Guardsmen stand in front of the Army ROTC building. (Kent State University)
The Ohio National Guard fire tear gas to disperse the crowd of students gathered on the commons on May 4, 1970.
Students dive to the ground as the Ohio National Guard fires on faculty and students on May 4, 1970. (Kent State University)
Wounded Kent State student John Cleary is attended to by other students, who helped save his life. (Kent State University)
Guardsmen surround the charred remains of the Army ROTC building. (Kent State University)