On Nov. 5, 2012, my friend Elliott Carter died in New York at the age of 103. For me, he was and remains one of the most interesting figures of music history in the past century.

Every great work of art has two faces, one toward its own time and one toward the future, toward eternity.

I used to conduct the last opera in Berlin on Sunday, get on a plane on Monday to Chicago, and start a rehearsal that same night, if it was a performance week.

Now the first step has to be taken, the step towards democracy. This step is full of risks, and requires trust on all sides. We don't know where it will lead. But if we just stand still, we will have no chance of escaping the violence.

I actually shoot. I enjoy target practice. I find it really zen. You focus on nothing but the target. You have to control your breathing. It's all part of my years in the military, where I was taught to become a marksman but also to respect my weapon.

Preemption is the right of any nation in order to preserve its National Security; however, preemptive war is a tactic, not a strategy. When used as a strategy preemption dilutes diplomacy, creates an atmosphere of distrust, and promotes regional instability.

Our national-security strategy must drive our military budget, rather than the budget setting our strategy.

Who doesn't love an ice-cold Coca Cola? I'm not the biggest fan. So my New Year's Resolution for 2015 was to reach every corner of the world where Coca-Cola is not officially distributed.