Despite Saudi Arabia's funding and arming of militants in Syria, Iraq and beyond, President Obama is set to visit the kingdom this week to meet with King Abdullah. It's the only Middle Eastern or Gulf nation on Obama's overseas itinerary. Many analysts say the conflict in Syria has grown into a proxy war between Saudi Arabia and Iran. Saudi Arabia's links to jihadist groups go back decades. Fifteen of the 19 Sept. 11 hijackers were Saudi. The 9/11 Commission Report identified Saudi Arabia as the main source of al-Qaeda financing. And in 2010, WikiLeaks published U.S. diplomatic cables which identified Saudi Arabia as the world's largest source of funds for Islamist militant groups. Members of Congress and human rights organizations have also been calling on Obama to address the kingdom's treatment of women, religious minorities and political activists.