Some of you know of my involvement with Rotary International; we have been working for over 30 years (with WHO) towards the eradication of polio. Bill Gates turned up at a conference in San Diego a few years ago - we didn't know he would be there - and donated $2.5 million, from the Foundation, on top of the $2m he'd already donated. It was a brilliant moment! He is so unassuming.
Good, as you say, Greatnan, to see the rich actually doing something.
(We, RI that is, we're challenged to match the last sum. And we did! But that's another story!)