As the world's most powerful leaders prepare to descend on Kananaskis, Alta., for this year's G7 summit, a famous Calgary welcome tradition may not take place this time.

Prince William and Kate, the Duke and Duchess of Cambridge, watch a bull riding demonstration during the Calgary Stampede on Thursday, July 7, 2011, in Calgary, Alberta, Canada.

As the world's most powerful leaders prepare to descend on Kananaskis, Alta., for this year's G7 summit, a famous Calgary welcome tradition may not take place this time.There are no current plans for ...

Prince William and Kate appeared to initially snub their western Canadian hosts by declining a time-honored Calgary tradition of wearing white cowboy hats — but later turned up for a rodeo show ...

Caption: President George W. Bush poses for photographers after being presented with a cowboy hat after his arrival in Calgary on June 25, 2002. At left is Calgary Mayor Dave Bronconnier.

Prince William and Kate appeared to initially snub their western Canadian hosts by declining a time-honored Calgary tradition of wearing white cowboy hats - but later turned up for a ...