Barack Obama has tweeted on the White House's official Twitter account:
20 beautiful children & 6 remarkable adults. Together, we will carry on & make our country worthy of their memory. -bo #MomentForSandyHook
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Labour can make a collective decision on whether to back renewal of Britain's nuclear deterrent, the shadow defence secretary said.
The whale is reported to be alive and thrashing about in the shallow water as coastguards keep an eye on it in Mundesley, Norfolk.
The train crash in southern Germany is just the latest in a history of rail accidents in the country.