Now that its deck paving is complete, the world's highest bridge is on track to open in Southwest China's Guizhou province by the end of September.

KATHMANDU, Nepal (AP) — A mountain river flooded by monsoon rains swept away the main bridge connecting Nepal with China on Tuesday, leaving 20 people missing, Nepali authorities said.

Designed to seamlessly traverse plains, rivers, farmland and occasionally the edge of urban developments, the bridge maintains consistent track alignment for trains reaching 217 mph.