The gravest threat faced by the world is of an extremist group getting hold of nuclear weapons or materials.

The Germans should be the first to sympathize with us [Egyptians]. They know how difficult it is to build a democracy following a dictatorship, and they were the first to be critical of Morsi's anti-democratic policies.

Egyptian President Mohammed Morsi grabbed full power for himself. Not even the pharaohs had so much authority, to say nothing of his predecessor Hosni Mubarak. This is a catastrophe - it a mockery of the revolution that brought him to power and an act that leads one to fear the worst.

The Egyptians have grown in confidence, theyve tasted freedom, and theres no way back.

I hope everybody will go back to the negotiating table. Ive always said this is the only way forward.

The Muslim Brotherhood is a religiously conservative group. They are a minority in Egypt. They are not a majority of the Egyptian people, but they have a lot of credibility because all the other liberal parties have been smothered for 30 years.

Nuclear proliferation is on the rise. Equipment, material and training were once largely inaccessible. Today, however, there is a sophisticated worldwide network that can deliver systems for producing material usable in weapons.