Qatar's Emir Sheikh Tamim bin Hamad Al-Thani, United Nations Secretary General Antonio Guterres and leaders of some of the world's most deprived nations attend the fifth edition of the UN Least Developed Countries summit, which kicked off in the capital Doha. "We don't have a moment to lose," says Guterres, adding that "Least Developed Countries are being stranded amidst the rising tide of crisis, uncertainty, climate chaos and deep global injustice." IMAGES AND SOUNDBITES