2010 Iowa Balloons - National Balloon Classic
Every year in the late summer or early autumn, there is a massive balloon festival in Indianola, Iowa. If you ever have the chance to attend, it's well worth it - especially the night glow events.
This was a particularly challenging day for the pilots as the wind was shifting and it was very crowded.
www.nationalballoonclassic.com/default.aspx (Thanks Don)
Canon 7d, 100-400L