The United States took military action against the Taliban due to the attacks on the World Trade Center in 2001 by al Qaeda. Osama bin Laden was determined to have had connections to the movement (however tenuous or extremist they may have been) and the movement itself oftentimes encouraged hostilities against Western states due to their century-long period of interference in Middle Eastern affairs.
Newton's first law says that <em>"every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force."</em>
All of those would be correct for it is pretty much impossible to break the law of motion. If you're moving or stationary, you need the influence of an external force to change the pattern.
The election will occur in 2018. A senators term lasts for 6 years, and since he was elected in 2012 it will be 6 years later