Sandy Nickerson of West Dundee, left, and Joe Stupec of Aurora, right, protest outside of ATMI Precast in Aurora on Monday, December 12, 2011. "I feel bad for these people," Stupec said, "It happened to me a long time ago and I never forgot it." | Brian Powers~Sun-Times Media
Valentin Vergara of Aurora, right, protests outside of ATMI Precast in Aurora on Monday, December 12, 2011. Vergara was employed at ATMI for over a year before losing his job there two weeks ago as the lock out ended. | Brian Powers~Sun-Times Media
Roger Fraser of Rolling Meadows, center, shouts with others protesting outside of ATMI Precast in Aurora on Monday, December 12, 2011. | Brian Powers~Sun-Times Media
Sandy Nickerson of West Dundee, left, and Joe Stupec of Aurora, right, protest outside of ATMI Precast in Aurora on Monday, December 12, 2011. "I feel bad for these people," Stupec said, "It happened to me a long time ago and I never forgot it." | Brian Powers~Sun-Times Media
AURORA — Protesters returned to picket ATMI Precast Inc. Monday, 12 days after several dozen employees, families and grassroots labor groups staged a march and rally in support of workers’ attempt to unionize. They also filed unfair labor practice charges on behalf of one of …
