The United States and Saudi Arabia work together on maintaining security in the Middle East. Despite the differences between the two countries, we both face the same terrorist enemies that seek our destruction in the post 9/11 era. Our counterterrorism cooperation with Saudi Arabia has increased. According to the Department of Treasury, the kingdom has made improvements in enforcing stringent banking rules that help stem the flow of money to terrorist groups through Saudi financial institutions. Saudi Arabia has launched aggressive military campaigns in Syria and Yemen, and while the kingdom has taken important steps since 9/11 to counter terrorism, it has some room to improve. The Kingdom of Saudi Arabia still spends billions of dollars every year exporting the Wahhabi interpretation of Islam by building mosques and schools throughout the world. Wahhabism is a fundamentalist form of Islam that insists on a literal interpretation of the Quran. Its 18th century founder Abd al Wahhab in seeking to purify Islam taught that apostates- Christians and Jews and some Muslims-should be persecuted and in some cases killed.