I loved the Nile cruise as well. Safe, the food was great, and expert tour guides accompanied us as we visited several temple and tombs. I was able to walk in the actual tomb of Tut at the Valley of the Kings.
A day at the Cairo museum is also a must! No long lines waiting to see the Tut exhibit, so much more than that to see as well.
When the security conditions are iffy, the Egyptian Tourism Department cranks up the bodyguards, and tourists get a royal experience.