A picture can be a whisper or a shout. In the hands of Dorothea Lange, it was a testimony. Through the lens of her camera, she gave a face to the suffering of millions, transforming anonymous hardship into an intimate, undeniable truth. Her most famous photograph, "Migrant Mother," became the defining image of the Great Depression, a haunting portrait of dignity in the face of despair. But Lange was more than the creator of a single iconic image. She was a pioneering documentarian who wielded her camera not as a passive observer, but as a powerful instrument for social change, forever altering how we see the world and each other.