This was a difficult challenge for me this week! I take lots of landscape photos, and my photos usually don't have people in them, let alone sounds. But, on this trip to Williams, AZ, the train to the Grand Canyon was at the station, getting ready to leave. People were boarding, after they heard the whistle. This is one of my husband's favorite sounds, a train. Both his father and grandfather worked for the railroad. Sunday Stills Challenge 083009.