While watching the nasa program on tv, i noticed what appeared to be a ufo travelling at an incredible speed as the iss viewed the earth below. when i noticed this small object on my tv screen, i recorded it. it definitely had to be a large object to be seen from the iss, and appeared to be travelling in the same direction as the iss. it was not a shadow nor reflection from the iss. i lost sight of the object when the program switched to something else. (note: i believe a mufon individual resides in fort worth, texas, to whom i be happy to show this recording.)