C-SPAN on Instagram: "#OnThisDay Aug. 28, 2008: Then-Sen. Barack Obama (D-IL) accepted the Democratic nomination for president at the party’s national convention in Denver. “America, we cannot turn back. Not with so much work to be done. Not with so many children to educate, and so many veterans to care for. Not with an economy to fix and cities to rebuild and farms to save. Not with so many families to protect and so many lives to mend,” he closed his remarks before 84,000 people. “America, we