Tim Davie says nothing is more important than reporting impartially, after officials search BBC offices.
A tour of town halls and libraries will "make great art accessible to everyone", a foundation says.
The organisation, which has around 32,000 employees, says the measure is to increase cybersecurity.
John Motson, who has died at the age of 77, was famed for his iconic football commentaries.
The Oscar-nominated actor reveals he confronted a fan who "put her hand on my ass".
The unit has "run many scenarios" in the wake of Will Smith slapping Chris Rock at last year's show.
Five famous lines from iconic BBC football commentator John Motson, who has died aged 77.
Legendary football commentator John Motson, who had an illustrious 50-year career with the BBC, dies aged 77.
Band member Benny Andersson gave permission for his song to be used in a Birmingham stage play.
Esquires in Bedford says it may have had to close due to its outdated fire alarm system.