Supporters of the Huthi rebels shout slogans outside Sanaa airport upon the arrival of the UN special envoy to Yemen in Sanaa on May 22, 2017. Bodyguards of the UN envoy Ismail Ould Cheikh Ahmed had to fire in the air to disperse the protesters after he arrived in rebel-held Sanaa to jumpstart peace talks, witnesses said. / AFP PHOTO / MOHAMMED HUWAIS (Photo credit should read MOHAMMED HUWAIS/AFP/Getty Images)
