NATO: The security of one billion people depends on it, but most young people couldn't explain it if their life depended on it.
So British content creator, Freddie Fraser, has teamed up with the UK's Joint Delegation to NATO, to find out more about it.
Freddie visits NATO HQ in Brussels, where he goes behind the scenes in a place not open to the public. The UK's Deputy Ambassador to NATO, Ingrid Southworth, guides Freddie inside the world's most successful alliance.