Turkey's deadliest earthquake in a generation has handed President Tayyip Erdogan a huge rescue and reconstruction challenge which will overshadow the run-up to May elections already set to be the toughest of his two decades in power.
A day after the quake struck, killing more than 3,500 people in Turkey, opposition parties and some residents in worst-hit areas complained that authorities were slow or ill-equipped to react to the devastation.
