Every year millions flock to Las Vegas trying to fulfill a dream and win big, but outside, and underground, another world stands in stark contrast; Lisa Ling investigates the dark underbelly of Sin City that few get to use.

Lisa takes a revealing look inside the world's most prestigious transgender beauty pageant, an exciting and emotional competition.

13 years after first reporting on the world's most dangerous gang, Lisa Ling returns to the ultraviolent world of MS-13.