This 5 May 2018 video from the USA says about itself:
Victims remembered on the 48th anniversary of the Kent State massacre
Kent State Massacre: new evidence here.
From Art Threat blog in the USA:
Kent State Massacre Remembered: Online Memorial
On May 4, 1970 four students of Kent State University were shot dead by National Guardsmen during a protest against the US government’s invasion of Cambodia. It was a horrific acting out of violence by the state against its citizens engaged only in the democratically legitimate activity of dissent.
Mike and Kendra’s website – May 4, 1970 – is an online archival memorial about the event and about the subsequent struggle to have actual memorials constructed in the parking lot where the students were killed.
The website documents in detail and with photographs what happened not only on May 4, but in the days leading up to the May 4 killings and the subsequent court trial. The website also provides information about the lesser known Jackson State tragedy where two students were killed and 12 others injured by gun fire from National Guardsmen and local police.
40 Years Ago: Police Kill Two Students at Jackson State in Mississippi, Ten Days After Kent State Killings: here.
Kucinich probes whether FBI informant shot first at Kent State: here.
Kent State: Was It about Civil Rights or Murdering Student Protesters? Here.
May 4, 2020 marks 50 years since the murder of four unarmed student protesters at Kent State University in northeast Ohio, and the wounding of nine others. All were shot by Ohio National Guard troops who opened fire on a crowd of antiwar demonstrators protesting the decision of President Richard Nixon to escalate the war in Vietnam by sending US troops into neighboring Cambodia: here.
The Port Huron Statement: A manifesto reconsidered, by Tom Hayden: here.