An estimated 70,000 Bosnians relocated to the Midwest from the former war-torn Yugoslavia, and thousands showed up for the friendly wrapped in flags and wearing team scarves, while a boisterous contingent lighted flares late in the second half.
Busch was perhaps a little more than half-filled for a game that carried lowered crowd expectations given the time of the year.
Bosnia has a player with local ties forward Vedad Ibisevic played at Roosevelt High and Saint Louis University. Ibisevic had perhaps the Bosnians' top chance when he shot just wide from the top of the box late in the first half.
Aguero has a pair of goals in four World Cup qualifiers. He banged in a rebound in the 39th minute after Bosnia goalkeeper Asmir Begovic charged out to stop Rodrigo Palacio, and then gathered a pass from Maximiliano Rodriguez to find the net in the 66th.
Aguero was shown his first yellow card of the year in the 59th minute when he kicked Emir Spahic in the back.