Following Iran's presidential election this summer, Neda Soltani was shot and killed on the streets of Tehran. She became the face of a powerful movement that threatened the hardline government's hold on power. FRONTLINE investigates the life and death of this woman, and also explores a number of unanswered questions in the aftermath of the greatest upheaval in Iran since the 1979 revolution. This program contains graphic imagery. Viewer discretion is advised.