April 1, 2013   In downtown Freedom City, the shops about the base of Pyramid Plaza bustled with customers looking to make up for the day prior's holiday. The spring weather meant lighter jackets than the receding winter chill had necessitated but the light cloud cover kept the breeze cool as shopping bags were juggled and grumpy children coming down from an excess of cheap chocolate added to the general din of the street.   That noise was abruptly overshadowed by a booming rumble in the ski