Having conquered its largest mountain last month, I'm now back from Africa and have just shared my story in a very big way: on both the CBS Evening News and CBS This Morning.

Seems so long ago now, but just last month, along with my two best friends, I summitted Tanzania's Mount Kilimanjaro with the aim of inspiring others to rethink their own "possible," and with a goal of raising $750,000 for Free The Children's clean-water projects in Kenya. The climb, which I completed primarily on my hands, captured the attention of media around the world.

I've had the incredible good fortune to not only meet Nelly Furtado but to call her friend. And now, unbelievably, she has been kind enough to combine her latest song with clips from my Kilimanjaro climb to make a lyric video. How great is that?

We were able to roll out the campaign last year with the support of a talented and resourceful network of incredible people. We hoped to raise money and draw attention (from anywhere we could) to our cause - to help provide clean water projects for East Africans suffering from the effects of the worst drought in the region in 60 years. 

As we made our final descent from the moorland to the Marnagu Huts, I began to reflect on the people who helped us realize our triumphant goal of summiting Mount Kilimanjaro. After all, it may have taken the better part of seven gruelling days to complete the actual climb, but Redefine Possible truly began many months before. We were urged to pursue this dream by so many believers, had it fuelled by them as we prepared, and were bolstered by their support every step up the mountain.

It's impossible to properly thank all of these amazing people in one message, and it would suck to miss anyone. But at the same time it would be a shame not to try, considering that possible has just been so recently redefined!

Hans Meyer cave to Uhuru Peak: 19, 340 ft.

Hike duration: 3 hours

Temperature: -5 degrees Celsius

Word that captures the day:
Spencer: "We...
David: "...made...
Alex: "...it!"

This was it. The day that possible would be redefined. It was an almighty struggle, but...WE MADE IT!

We woke super-early (4 AM) to a light breakfast, and then prepared for our final ascent. Our goal, quite simply: to reach Uhuru Peak, the summit of Mount Kilimanjaro.