When we arrived at Kennedy Space Center Monday morning, the sky was pretty thickly overcast. I began to worry that the launch would be postponed due to poor weather. However, it slowly broke up after about 10 am, but the sky never fully cleared. I guess a few clouds didn't really hurt anything, and may have even helped a little bit. I got this neat picture as Atlantis flew through a low cloud, lighting it up from the inside in a rather spectacular fashion.