Today, no walls can separate humanitarian or human rights crises in one part of the world from national security crises in another. What begins with the failure to uphold the dignity of one life all too often ends with a calamity for entire nations.

Nelson Mandela stands as an inspiration to us all

Often, we take stability - peace in terms of security and economic activity - to mean a country is doing well. We forget the third and important pillar of rule of law and respect for human rights, because no country can long remain prosperous without that third pillar.

Once you are really challenged, you find something in yourself. Man doesn't know what he is capable of until he is asked.

I observe a lot. I see a lot around me.

This is a day on which we pay our respects to those who have endured the unimaginable. This is an occasion for the world to speak up against the unspeakable. It is long overdue that a day be dedicated to remembering and supporting the many victims and survivors of torture around the world.

As we move forward, you cannot resolve the potential food crisis or shortages without science being part of the solution. Science has to be part of the solution but African governments - and these are decisions for governments, whether they embrace or do not embrace genetically modified food - and for the moment, most African companies do not accept genetically modified seeds.