United States President Donald Trump on Thursday ordered the declassification and release of all remaining files related to the assassination of former US President John F Kennedy.

Trump also ordered the release of the last remaining records on the assassinations of Robert F Kennedy, JFK’s younger brother, and the civil rights icon Martin Luther King Jr.

Their deaths have been the subject of popular conspiracy theories for six decades, with surveys showing widespread doubt about official explanations of the killings.

“This is a big one. A lot of people have been waiting for this for years, for decades,” Trump said while signing the order at the White House.

“And everything will be revealed.”

According to Trump’s order, the Director of National Intelligence must present a plan within 15 days for the full and complete release of files related to JFK’s assassination.

For the other two assassinations, DNI must present a plan within 45 days for the release of their documents.