At Kennedy Catholic High School, crowds gathered after two recently engaged LGBT teachers left their jobs.
Police removed the invasive plant, which appeared 20 to 30 feet high in some parts.
A man from Cornwall who died helping to save thousands of lives during the 9/11 World Trade Center attacks in New York has been posthumously honoured at the White House.
Rick Rescorla - who was originally from Hayle in Cornwall - worked for a bank based in the south tower.
He evacuated more than 2,500 employees on 11 September 2001 before returning inside - but his body was never found.
His widow Susan accepted the Presidential Citizens Medal from President Donald Trump.
Mr Rescorla sang Cornish songs as he led people out of the World Trade Center.