a dozen horses fall through a layer of ice and rescuers race against temperatures and time to try to save them. >> everything just cracked. >> and then -- poof. >> riiceland, january 2009. the country's top equestrians kick off the league. >> it was a normal day. everybody was going to have a really nice time and see the beautiful horses. >> no one is aware this event will end like never before. >> it was supposed to be a show. and it was a huge show. >> icelandic horses are intimately linked to the national identity. the sturdy, good natured breed has survived in one of the planet's most challenging