Fifty years on, the US role in overthrowing the socialist government of Salvador Allende is not a secret. But as documents that surfaced over the past couple months should remind us, there’s still a whole lot that’s being kept from us about this shocking crime.

This past August saw several documents released that shed added light on the Richard Nixon administration’s involvement in the coup’s plotting, obtained through a Freedom of Information Act (FOIA) request by National Security Archive analyst Peter Kornbluh. While we’ve long known that Nixon and his secretary of state Henry Kissinger worked aggressively to overturn Chile’s election in 1970, these releases give us a fuller picture of how exactly that was carried out.

One set of documents, for example, details previously unknown meetings shortly after the election between US officials, including Nixon, and Agustín Edwards, a right-wing Chilean media tycoon. Kornbluh points out that, according to a declassified memo handwritten by then CIA director Richard Helms, it was only six hours after this meeting that Nixon brought Kissinger, Helms, and Attorney General John Mitchell into the Oval Office and ordered them to come up with a “game plan” within forty-eight hours to stop Allende from being inaugurated. We’d previously known that Edwards and Helms had taken part in a meeting days after the election, when the conservative magnate had discussed how a coup might be carried out.