I've passed through Frankfurt a couple of times with time to spare to take some photos. The security at the spectators' terrace was the toughest I've ever experienced, and that's after 8 flights to, round and from the US in the previous three weeks. The terrace had no facilities, not even a shelter or a cafe.
If you want more shots of any particular plane, I may have them, and if you want higher res images, I have got them. Just email me!