Atlantis's belly with the thermal protection tiles. As a neat detail, a KSC employee nearby offered a (amazingly light!) sample to touch, the first time I had held one in my hand.

Space Holiday 2014: Photo 124 / 249

Atlantis's belly with the thermal protection tiles. As a neat detail, a KSC employee nearby offered a (amazingly light!) sample to touch, the first time I had held one in my hand.

Atlantis's belly with the thermal protection tiles. As a neat detail, a KSC employee nearby offered a (amazingly light!) sample to touch, the first time I had held one in my hand.