The article states that US Airforce told British Royal Airforce pilots to trim their moustache, because apparently, the US Airforce has rules regarding the length and width of moustaches.
The humour, however, lies in this statement:
‘But round the world it is completely different. Indian police get paid more if they have one [mustache] because they look more manly.’
That and the fact there is a ‘Handlebar Club’ devoted to mustaches of that style. See http://www.handlebarclub.co.uk/
Tags: funny, interesting, moustache, mustache, odd, royal airforce, us af