Across Turkey, hundreds of thousands of people have been taking to the streets after the arrest of President Erdogan’s main political rival, the Mayor of Istanbul Ekrem Imamoglu. It is the worst unrest for more than a decade and police have fired tear gas and rubber bullets at protestors and arrested hundreds of people. Presenter Mark Lowen was in Turkey earlier this week and meets two university students, who say they are protesting to protect democracy. He also brings together three Turkish journalists who share their experiences of being targeted by government security forces.