Mexican nationals head across the international bridge connecting dusty Presidio, Texas, and Ojinaga, Mexico, after getting off a bus from Tucson earlier this month. Bob Daemmrich/Texas Tribune hide caption

Behind Enemy Lines: With Earth in trouble, humans are off to Pandora — and the native Na'vi are ready to fight for their home. Genetically hybridized and assigned to infiltrate them, combat veteran Jake Sully (Sam Worthington, left) goes native himself when he meets Neytiri (Zoe Saldana). WETA/20th Century Fox hide caption