The world’s smallest oil refinery sits on the side of the road just outside of Lusk, Wyoming, a windswept prairie town, population 1,558. A half a world away in Islamabad, Pakistan, its owner, Zahir Khalid, works to keep the tiny industrial site from literally blowing away. Khalid purchased the C&H Refinery in 1998 after learning it was for sale on an early Yahoo chat room. A devout Muslim, Khalid has the military bearing and discipline from his former life as a fighter pilot, and the persuasive charism of a wheeler-dealer…