Edward Snowden has been the subject of several high-profile
appeals this year, calling on Barack Obama to pardon the National Security Agency
whistleblower and allow him to return home to the US.
Writers, intelligence experts, film stars and tech tycoons have all Now the
most audacious display of support for Snowden is under way. Messages calling
for his pardon are being beamed on to the outside wall of the Newseum, the Washington
institution devoted to freedom of speech and the press that stands less than
two miles from the White House.