Students and families were reunited in emotional scenes after the shooting at Arapahoe high school in Colorado.
A 15-year-old girl was in critical condition after the shooting, suspected to have been carried out by an 18-year-old, Karl Pierson, who police say apparently shot himself at the scene.
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During the US presidential inauguration in a secret and secure location someone will be standing by in case the 'unthinkable happens'.
Ahead of the Donald Trump's inauguration, a team of understudies have been going through their paces to ensure the day runs smoothly.
The incoming White House press secretary has said Donald Trump's speech is going to be "less of an agenda."