Advisor to Pakistani Prime Minister on Foreign Affairs, Sartaj Aziz (R) speaks during a joint briefing with Iranian Foreign Minister, Mohammad Javad Zarif (L) at the Foreign Ministry in Islamabad on April 8, 2015. Iran, the major Shiite power, has strongly criticised the military operation in Yemen by a coalition of largely Sunni Muslim nations and accuses Saudi Arabia of sowing instability with its air campaign. AFP PHOTO / Farooq NAEEM (Photo credit should read FAROOQ NAEEM/AFP/Getty Images)