The John F Kennedy Presidential Library in Boston in the state of Massachusetts has begun chronicling the former US president's 1,000 days in office on the micro-blogging website Twitter.

The account @Kennedy1961 began posting tweets on Thursday about the former president's actions and words as they unfolded 50 years ago.

The library is linking to video and pictures from its digitised archive.

Thursday marks the 50th anniversary of Kennedy's inauguration....