Participants observe a minute silence during a candle light vigil for two refugees, a Somali woman and an Iranian man who set themselves on fire on the remote Pacific island of Nauru, during a candle light vigil in Sydney on May 4, 2016. More than 750 asylum-seekers held in a Papua New Guinea detention camp launched legal action on May 4, 2016 to be moved to Australia after a court in the Pacific nation found the centre unconstitutional. / AFP / SAEED