Rep. Ako Abdul-Samad, D-Des Moines, sits at his desk in the Iowa House Wednesday, April 4, 2012, at the Statehouse in Des Moines, Iowa. State patrol officers stopped anyone from entering or leaving the Statehouse on Tuesday evening after Abdul-Samad opened an envelope at his desk and powder spilled out. After about four hours officers announced the powder had been deemed harmless and that people could leave the building. (AP Photo/Charlie Neibergall)
April 5, 2012 12:53:31 PM PDT
DES MOINES, Iowa - April 05, 2012 --
Officials say the white powder that prompted a lockdown of the Iowa Statehouse earlier this week turned out to be a common antacid.