Flags are flying at half-staff at Alabama's Capitol, and people are pausing statewide to remember victims of the Sept. 11 terror attacks 11 years after they occurred. Birmingham fire stations displayed their fire engines with the lights on Tuesday to mark the anniversary of Sept. 11, 2001. Police in Decatur took time to salute people killed in the attacks. Students at Saint Pius X Catholic School in Mobile are giving out patriotic ribbons on the anniversary. Many people sent tweets about being in school in Tuscaloosa or stuck in traffic in Birmingham when they learned of the attacks. Alabama National Guard members are among the U.S. troops still based in Afghanistan 11 years after the attacks. The Guard has called more than 18,000 people to active duty since 9/11. Copyright 2012 The Associated Press