A large amount of smoke was seen near downtown Des Moines Wednesday afternoon around 1:30 p.m.If you were curious about what caused it, you certainly weren't alone.There's no need to worry, however. The city of Des Moines says the smoke south of downtown is from a controlled burn at the Cownie Soccer Complex.» Download the free KCCI app to get updates on the go: Apple | Google PlayGet the latest headlines from KCCI