Another year, another Keystone XL (KXL) Pipeline anniversary. It is hard to believe that we're at the seven year mark since TransCanada first submitted its application to the US State Department.

This milestone is far from celebratory—rather, it is met with frustration and the deafening silence of lost opportunities. It is widely known that approving KXL would strengthen our country's national security, energy independence and economic prosperity. And yet, the Obama Administration has played a cat and mouse game over the years—studying, analyzing, and agonizing over KXL so much that it has become the political poster child for cross-border pipelines.

Supporters of the project bemoan the fact that progress is at a standstill, yet they are far from resigned. Only time will tell when—and if—the Obama Administration will ultimately decide Keystone's fate. Until then, hope springs eternal for lawmakers and stakeholders alike who continue to champion the pipeline. On this 7th anniversary, let's take a walk down memory lane and reminisce about KXL's journey thus far.