It was a creed written into the founding documents that declared the destiny of a nation: Yes, we can. It was whispered by slaves and abolitionists as they blazed a trail towards freedom through the darkest of nights. Yes, we can. It was sung by immigrants as they struck out from distant shores and pioneers who pushed westward against an unforgiving wilderness. Yes, we can. It was the call of workers who organized, women who reached for the ballot, a president who chose the moon as our new frontier, and a king who took us to the mountaintop and pointed the way to the promised land.