Empty cooking gas cylinders are seen in Sanaa, Yemen, on Sept. 18, 2018. Streets are almost empty in Yemen's capital Sanaa as a week-long severe fuel shortage forces hundreds of thousands of vehicles to silently die off the roads. The major fuel crisis was triggered by the escalating war earlier this week in the country's strategic Red Sea port city of Hodeidah following the collapse of peace talks brokered by the United Nations in Geneva between Yemeni warring parties. (Xinhua/Mohamed al-Azaki)