US President Barack Obama (L) meets with Saudi King Abdullah (R) at Rawdat Khurayim, the monarch's desert camp 60 KM (35 miles) northeast of Riyadh, on March 28, 2014. Obama arrived in Riyadh for talks with Saudi King Abdullah as mistrust fuelled by differences over Iran and Syria overshadows a decades-long alliance between their countries. AFP PHOTO / SAUL LOEB