Here are some photos from an airplane (the ones where you can see part of a plane in the picture). The first photo is of a subsun over a deck of stratus. The fourth photo is of a halo around the sun, and the last photo is just clouds with no special optical phenomenon (other than being cool). The third photo is of cirrus clouds (as seen from the ground) in Atlanta in early February. Finally, the weird looking photo is of the sun, after I messed with the contrast and shading to make it look this way (the photo, not the sun itself, although I do have such powers).