Adam Lanza, the gunman who killed 20 children and six adults in an elementary school shooting in Connecticut, acted on his own, a year-long inquiry into the massacre has ruled.
The report, published today, admitted that questions about Lanza's motive may "never be answered conclusively."
More top news
Hungarian Prime Minister Viktor Orban is to meet with European Union leaders in Brussels today to discuss the migration crisis.
Drinkers subsidise non-drinkers by £6.5 billion a year, a report claims.
Tight security in Beijing as China marks the 70th anniversary of the end of World War Two with a huge military parade.