now delighted to invite to the stage three leading civil society voices on ocean conservation, philippe cousteau of earth echo international, margaret leinen and enrique sala of national geographic. they will each present their thoughts on the theme "exploring, understanding and conserving our ocean." and while they take the stage, the images you will see around the room are from one of the best love known and most -- best known and most loved versions of science, thal vin submersible -- alvin submersible, which just turned 50 years old this year. [applause] ♪ in the year that i was born, lived a man who sailed to sea. ♪ and he told us of his life in the land of submarines. ♪ so we sailed on to the sun until we found a sea of green. ♪ and we live beneath the waves in our yellow submarine. ♪ we all live in a yellow submarine, yellow submarine, yellow submarine. ♪ we all live in a yellow submarine, yellow submarine, yellow submarine. ♪ and and our friends are all aboard, many more of them live next door. ♪ and the band begins to play -- ♪ we all live in a yellow submarine, yellow submarine, yellow