GAZA CITY, June 28, 2016 (Xinhua) -- United Nations Secretary General Ban Ki-moon (C) waves to the media as he arrives to visit a Qatari-funded rehabilitation and artificial limbs hospital in Gaza City, June 28, 2016. United Nations Secretary General Ban Ki-moon on Tuesday called for ending the Israeli blockade on the Gaza Strip and described it as "collective punishment." (Xinhua/Yasser Qudih)