Rare documentary - Area 51 one of the most protected and secret military installations

Apparently an US base as any other, Area 51 is one of the most protected and secret military installations across the world. In 1989 a former employed called Bob Lazar declared that inside it exist an alien starships and corpses investigated by engineers and scientists, creating a polemic that it continues nowadays. Are there really in this place alien bodies and starships inside responsible of the fast evolution of the human technology in the 20th century? Lazar is simply a liar looking for fame and fortune? Which of the two is lying to the world?