Deborah Pfingston's son Andrew Ashcraft, 29, was one of 19 firefighters killed fighting wildfires in Arizona.
She paid a moving tribute to him, saying he 'lived and breathed' his work.
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Four people have been stabbed in a series of knife attacks at the Notting Hill Carnival.
Mostly fine for Bank Holiday Monday
The bus was travelling to Baton Rouge on Sunday morning to deliver flood relief aid when the crash happened.