Although we live in a safe and stable country, Central Africa as a region has been held back by seemingly perpetual conflict - over power, resources, and who controls them.

We are fighting corruption and all illegal activities and building a culture of transparency and ethical governance.

There is nothing that you can do without working.

I developed the armed forces, especially in a way that improved living and working conditions. My record is there.

To be sure, the vast majority of people who are untrained can accept the results of science only on authority.

Whenever one reads of the determination of the species, or opens a book on natural science and history, in whatever language, one inevitably comes across the name of Linne.

My own ideas on the mechanism of catalytic phenomena were very different from those at one time commonly held, ideas which I no doubt owed to the influence of the illustrious teacher who had guided my first steps in chemistry nearly twenty years before - I refer, of course, to Berthelot.

The American people know that climate change is the kind of problem only America can solve.