What could he do? Frantically, his mind searched for a solution, but in his heart he knew it was impossible to rescue Greg and make it back in time to lower the bridge. The train whistle sounded again, this time much closer. What should he do! There were 400 people on that train, and many of them would die if the bridge was not lowered in time. But, this was his son - his only son, whom he dearly loved. Off in the distance, the puffing of the locomotive again reminded him that time was running out.