CHARLOTTE -- At political conventions, balloon drops usually produce iconic images of presidential nominees frolicking with their families in a sea of red, white and blue balloons triumphantly raining down on the arena stage. But Democratic sources tell Fox News this is one tradition President Obama will likely now have to skip after officials at the Democratic National Convention decided to move his Thursday night acceptance speech from the 65,000-seat outdoor Bank of America Stadium to the much-smaller indoor Time Warner Cable Arena, citing weather concerns. If you're standing on the main floor of the Time Warner center and look...