Boston Mayor Marty Walsh urged people on Twitter to join in a moment of silence to honour those affected by last year's marathon bombings:
More top news
A British tourist has been injured by a 12-foot hammock fell off a skyscraper in Manhattan.
Katie Price has defended using the n-word on live television after saying it twice on This Morning.
The 'obsessive and manipulative' stalker who cut his ex-girlfriend's throat as deep as her spine has been jailed for life.