Climate-change protesters say they will target London's Heathrow Airport

The Extinction Rebellion group of climate change campaigners said it planned to hold a protest at London's Heathrow Airport on Friday, opening a new front in its demonstrations that have caused transport snarl-ups in the British capital.Extinction Rebellion has blocked several locations in central London this week after it staged a semi-nude protest in parliament earlier this month.Extinction Rebellion sent a message to media titled "Statement on the Extinction Rebellion Heathrow Action Tomorrow