I think there's value in experience and observations that link past to present.

I've been producing documentaries on global warming for 20 years and have seen the early warnings of extreme weather events come true.

If you're a producer, you always spend too much money because you want that shot - and you're willing to spend a bundle to get it.

I never wanted to retire. I wanted to kind of shift my work pattern so I could stay fresh and invigorated, and use the experience that I had gained in 30 years, but in a slightly different direction.

All vacations can come down to a few little moments - what do your remember when you're alone, totally relaxed and taken out of yourself to appreciate this other world.

Frontline' does 10 news shows a year, so one a week is quite an undertaking.

That's the reason I left the networks. I wanted to write and report and coanchor.