According to local NBC-affiliated TV station in Colorado, Arapahoe High School has 2,229 students.
It is in Centennial, a surburb of Denver.
More top news
Hundreds of operations will be cancelled and waiting lists will grow if the NHS is as busy as last winter, according to Labour analysis.
A 28-year-old man has been charged over the stabbing of a surgeon outside a mosque.
A quiet night to come across the UK.