US Defense Secretary James Mattis attends a meeting with Saudi Deputy Crown Prince Mohammed bin Salman and officials in Riyadh on April 19, 2017. Photo credit: Getty Images
A demonstrator wearing a gas mask is engulfed in a cloud of tear gas fired by riot police during an opposition march against Venezuelan President Nicolas Maduro, in Caracas on April 19, 2017. Venezuelans took to the streets for massive demonstrations for and against Maduro, whose push to tighten his grip on power has triggered deadly unrest that has escalated the country's political and economic crisis. Photo credit: Getty Images
The energy ministers of Qatar (Mohammed bin Saleh al-Sada), UAE (Suhail al-Mazrouei) and Saudi Arabia (Khaled al-Falih), attend the GCC Petroleum Media Forum on April 20, 2017 in Abu Dhabi. Al-Falih said that oil-producing countries might have to extend output cuts agreed for the first six months of the year in order to achieve the desired rebalancing of the market. Photo credit: Getty Images
British opposition Labour party leader, Jeremy Corbyn poses for a selfie after delivering his first campaign speech of the 2017 election in central London on April 20, 2017. Corbyn pitched himself as the anti-establishment candidate for the June snap election, brushing off his party's dire poll ratings. Photo credit: Getty Images
A tiger licks an ice slab to keep cool at Karachi Zoo during a heatwave in Karachi on April 19, 2017. Heatwave conditions in Pakistan have brought temperatures in excess of 45 degrees celsius in many parts of the country. Photo credit: Getty Images