Once bin Laden brought the Twins down, once the Sunni Saudi connections were made, once Afghanistan was all lit up, al Qaeda went on the run and found the terrorist arms of the Islamic Republic of Iran wide-open and waiting.
Ever since Beirut 1983, Iran's jihadis have been specifically targeting terrorist death upon Americans; even the overwhelming number of fatalities/injuries done to America's military during the latest Iraq war was inflicted by Iranian weapons and training, carried-out by Shia Iraqis sectarianly loyal to their brother Shia jihadis in Iran.
Unarguably, the blossom of all Islamic terrorism in the world roots directly from the Wahhabis in Riyadh and the Twelvers in Tehran. If America ever actually produces any practical intention of declaring war against Islamic terrorism, jihadis both in the Kingdom of Saudi Arabia and the Islamic Republic of Iran must get that message first - directly, without any possibility of misinterpretation.
Anything less on the part of all American political leadership is simply dereliction of duty, and the despicable abetting of even more American lives yet to be killed by Islamic terrorism, meaning more American blood on America's own hands.