"I don’t know where it came from. It’s like one of my favourite things Hank Williams said when he was asked about where he got his songs. He said, 'I just hold the pen, God writes the song.' That’s how I feel about this one." Alan Jackson on his post-9/11 anthem Where Were You (When the World Stopped Turning), which he'll perform at the Concert for Hope at the Washington National Cathedral on the 10th anniversary of the terrorist attacks.