Vettel slams radio rules as 'joke'

By Abhishek Takle BUDAPEST, July 21 (Reuters) - - Former world champion Sebastian Vettel has slammed Formula One's decision to tighten radio rules, saying that drivers and teams should be free to say whatever they want to each other during a race. "All the radio issues we've had, I think it's a joke," the Ferrari driver told reporters on Thursday during preparations for this weekend's Hungarian Grand Prix. The governing International Automobile Federation's (FIA) Formula One race director Charli