For the second year in a row, barely half of Bibb County's high school students graduated. Twiggs County had the lowest graduation rate of any system in the state, just over 45 percent, while 6 out of 7 Hancock County students graduated -- 86.5 percent. Those were some of the results when state education officials announced 2012 statewide graduation rates. Bibb County's rate was about 52 percent...