Do the new files solve the JFK debate? It is more than 60 years since the US president was shot in Texas. Yet speculation about the killing has become only more intense with time.
One assassination. A thousand theories
Secrets: Donald Trump has begun releasing classified files on the 1963 assassination of President John F Kennedy (pictured above just before he was shot dead) making thousands of records available to the public for the first time. Glossary
Assassination - The murder of an important person, such as a politician, royal or business leader.
Lee Harvey Oswald - The US Marine veteran who assassinated John F Kennedy.
Sceptics - Those who doubt commonly accepted opinions - named after the "skeptic" philosophers of Ancient Greece.
CIA - The Central Intelligence Agency is a US government organisation that collects secret information about other countries.
Mafia - An organised international body of criminals, operating originally in Sicily and now especially in Italy and the US.
Redacted - To obscure or remove (text) from a document prior to publication or release.