I don't think that's the case. I would bet good money that Mubarak got the green light from the Bush Administration before pursuing this. And, if not, the difference is that with American support, it will actually work out and contribute to Egypt's stability and development. To do it against America's wishes would risk too much. The key to all this is Iran: in normal times, Israel would be screaming bloody murder about any nuclear developments in Egypt, and America would be applying lots of pressure to stop it. But Israel, the Arab states and the USA all more concerned about Iran/Hezbollah/Hamas than they are about one another, the stage is set for improved strategic coherence cemented by nuclear infrastructure. Interesting times.