US Secretary of State John Kerry tweeted on the first anniversary of the Boston Marathon bombings:
One year later, even if you were miles from home, no Bostonian will forget this day. Remember victims, honor heroes. We are #BostonStrong.
More top news
North Korean leader Kim Jong-un is not "insane", according to US Secretary of State Rex Tillerson.
A woman has been shot by police during a counter-terrorism operation in which four people were arrested.
Boris Johnson's sister has joined the Liberal Democrats to fight against hard Brexit - in a sign of family division over Europe.