Touchdown. Credits: NASA

Touchdown. Credits: NASA

Alexander. Credits: NASA

Alexander. Credits: NASA

Reid. Credits: NASA

Reid. Credits: NASA

Alexander. Credits: NASA

Alexander. Credits: NASA

Max. Credits: NASA

Max. Credits: NASA[caption id="attachment_943" align="alignnone" width="640"]Touchdown. Credits: NASA Touchdown. Credits: NASA

Alexander. Credits: NASA

Alexander. Credits: NASA

Reid. Credits: NASA

Reid. Credits: NASA

Alexander. Credits: NASA

Alexander. Credits: NASA

Max. Credits: NASA

Max. Credits: NASA

[/caption]