A city-within-the-city on Baltimore's sleepy South Shore? That's what Under Armour's Kevin Plank has in mind for Port Covington. His company, Sagamore, has planned a massive mixed-use development there, centered on a new UA corporate headquarters. And they've asked taxpayers for the biggest financing package in city history - $660 million in bond funding for $535 million in infrastructure improvements. Why, many residents are asking, should a brand new mini-city get such massive aid when the old one has such urgent needs?