VIENNA, July 1, 2016 (Xinhua) -- Head of the Austrian Freedom Party (FPOe) Heinz-Christian Strache (3rd L) speaks at a news conference in Vienna, Austria, July 1, 2016. Austria's constitutional court on Friday accepted a challenge filed by the anti-immigration Freedom Party over the run-off presidential election on May 22, and ordered the election to be held again. (Xinhua/Qian Yi)