Moral Question

The situation:

You're in the Middle East, and there's a huge flood in progress.
Many homes have been lost, water supplies compromised,
and structures destroyed.

Let's say that you're a photographer and getting still photos for a
news service, traveling alone, looking for particularly poignant scenes.

You come across Osama Bin Laden who has been swept away by
the floodwaters. He is barely hanging on to a tree limb and
is about to go under.

You can either put down your camera and save him, or take a Pulitzer
Prize winning photograph of him as he loses his grip on the limb.

So, here's the question and think carefully before you
answer the question below:

Which lens would you use?