The Atlas-Agena-4 boosted the Ranger IV spacecraft for the first U.S. lunar impact on April 23, 1962
NASA
Taken on 23 April 1962
<a rel="nofollow" class="external free" href="http://mix.msfc.nasa.gov/abstracts.php?p=903">http://mix.msfc.nasa.gov/abstracts.php?p=903</a>