RIYADH: A pair of conjoined Tanzanian twins on Wednesday arrived in Riyadh where they will be assessed to see whether they can be separated. The twin boys, named Hassan and Hussain, were accompanied by their mother and were transferred to King Abdullah Specialized Children’s Hospital on arrival. They traveled on a medical evacuation plane at the directive of King Salman and Crown Prince Mohammed bin Salman.    The head of the medical team Dr. Abdullah bin Abdulaziz Al-Rabeeah overseeing the assessment thanked the Saudi leadership for their support of the Saudi program to separate conjoined twins and general humanitarian work.