On Thursday 14 April google are using Hang Son Doong as their doodle. This is the date the cave was fully explored and a complete survey produced. I believe they will be links to images and videos from google home page that day to the cave. It may be the first time caves have been on Google homepage, any good caving promotion can only be good for the sport. I have attached an image Deb took on a recent trip into Son Doong in a major flood. The waterfalls you see are all over 200m high and the noise was deafening but spectacular. The other image is of the same place 5 days later.