Jackson, Wyo. — A large chunk of a twisting mountain pass road collapsed in Wyoming, authorities said Saturday, leaving a gaping chasm in the highway and severing a well-traveled commuter link between small towns in eastern Idaho and the tourist destination of Jackson. Aerial photos and drone video of the collapse show the Teton Pass road riven with deep cracks, and a big section of the pavement disappeared altogether. Part of the guardrail dangled into the void, and orange traffic drums marked off the danger area. The road was closed at the time of the collapse.