ISLAMABAD: Prime Minister Yousuf Raza Gilani left here on Saturday for a four-day visit to Sharm El Sheikh to attend the World Economic Forum (WEF).nnThe three-day WEF is being held on May 18-20 in the Egyptian city Sharm El Sheikh situated at the coastal strip between Red Sea and Mount Sinai.nnThe Prime Minister will hold talks on the sidelines with U.S. President George Bush, Afghan President Hamid Karzai, Egyptian Prime Minister Ahmed Nazif and Prime Minister of Palestine Authority Salam Fayyad.