Barack Obama will travel on Sunday to Newtown, Connecticut, the site of the deadly elementary school shooting.
He is expected to meet with families of the victims and will speak at a service.
More top news
Labour leadership contender Owen Smith has called his rival Jeremy Corbyn a "lunatic" at a rally.
A 6.2 magnitude earthquake has left at least 10 people dead and caused destruction in central Italy.
Airstrikes were launched into Syria and tanks reportedly sent in as Turkey targets militants threatening its border.