Washington Mayor Vincent Gray joined president Obama's call for action on gun control, mentioning that one of the Navy Yard victims, Arthur Daniels, had already lost his 14-year-old son to gun violence and citing the string of mass public shootings in recent years.
President Obama said: "We Americans are not an inherently more violent people than folks in other countries, we are not inherently more prone to mental health problems, the main difference that sets our nation apart, what's different in America is it's easy to get your hands on a gun."
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Parts of the UK will feel colder than the Arctic Circle in the coming week as bitter winds make it feel -15C in some places.
At least three people have been killed in clashes in eastern Ghouta just hours after the UN Security Council backed a 30-day ceasefire.
Very Very Cold !