The US embarked on the Ranger program in 1959, managed by NASA's Jet Propulsion Laboratory. The Block I Ranger 1 and Ranger 2 suffered Atlas-Agena launch failures in August and November 1961. The Block II Ranger 3 launched successfully on January 26, 1962, but missed the Moon. The Ranger 4 became the first US spacecraft to reach the Moon, but its solar panels and navigational system failed near the Moon and it impacted the far side without returning any scientific data. Ranger 5 ran out of power and missed the Moon by on October 21, 1962. The first successful Ranger mission was the Block III Ranger 7 which impacted on July 31, 1964. Ranger had three successful impactors out of nine attempts.