Tonight is the night for an estimated 400 Warren County students scheduled to walk the stage and become high school graduates.The ceremony is set to begin at 7 p.m. at Nunley Stadium.Among the highlights, the eight valedictorians of the class of 2011 are scheduled to share a keynote address titled “We Are On Our Way.” Joel Rowland just missed the cut to becoming a valedictorian and agonized about it yesterday.“I finished No. 9 in the class,” said Rowland, who will get to wear a blue graduation gown tonight for finishing in the top 10 percent.