Alexis Tsipras, the one-time leftist firebrand who stormed to power on an anti-austerity agenda in Greece in 2015, stepped down from the helm of the Syriza party after 15 years on Thursday, following a heavy election defeat.
At the height of Greece's deep economic crisis, Tsipras, known for sporting his no-tie look, rode a wave of anti-establishment anger to become the country's first leftist prime minister.