Yemeni women hold the flag of Yemen's Southern Separatist Movement as they hold a sit-in calling for a more peaceful life during international women's day in the southern city of Aden on March 8, 2016.
The United Nations warned this month of a "human catastrophe unfolding in Yemen", where it says more than 6,100 people had been killed in the fighting since last March. It says another 3,000 people had been wounded and 2.5 million people forced to flee their homes. In March 2015, Saudi Arabia began leading a military campaign against the Shiite rebels and their allies in its southern neighbour.
/ AFP / SALEH AL-OBEIDI (Photo credit should read SALEH AL-OBEIDI/AFP/Getty Images)