The Hamburg "Wheel."
From Europe: May/June 2015
From MA's BD on the Oregon Coast: Nov. 2008
From FL, GA & SC: September 2008
From Victoria/ Butchart Gardens, BC and Lake Quinault WA: June 2008
The Xiongnu were driven into the far north of the Gobi. To maintain the safety of the Hexi Corridor (today's Gansu Province), the emperor ordered the extension of the Great Wall westward into the Hexi Corridor and Xinjiang region.
From China/Tibet: Sep.- Oct. 2007
From Florida and DC: May, 2007