Pictures from inside the Sandy Hook Elementary School released by Connecticut authorities show how Adam Lanza shot his way into the school building through a glass window.
He went on to kill 26 people, including 20 children.
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Rain will continue to swirl around an area of low pressure over the UK bringing further prolonged spells of rain to some areas.
As a deadline looms for talks to salvage power sharing in Northern Ireland, Sinn Fein has warned it is "make your mind up time for the DUP".
Female tennis players should play five-set matches because limiting them to three sets is "degrading", academics have argued.