Remembering History: February 15, 1925: Sled Dogs bring diptheria serum to Nome. An outbreak of diptheria in Nome, Alaska, would have had dire consequences had it not been for the dog sled teams bringing the antitoxin. In all, 20 mushers and about 150 sled dogs participated, but Balto -- seen here with musher Gunna Kaasen -- led the final lap and received most of the credit. He became the second most famous dog of the era. (In popularity, nobody could beat Rin Tin Tin.)

February 15, 1925: Sled Dogs bring diptheria serum to Nome. An outbreak of diptheria in Nome, Alaska, would have had dire consequences had it not been for the dog sled teams bringing the antitoxin. In all, 20 mushers and about 150 sled dogs participated, but Balto -- seen here with musher Gunna Kaasen -- led the final lap and received most of the credit. He became the second most famous dog of the era. (In popularity, nobody could beat Rin Tin Tin.)

February 15, 1925: Sled Dogs bring diptheria serum to Nome. An outbreak of diptheria in Nome, Alaska, would have had dire consequences had it not been for the dog sled teams bringing the antitoxin. In all, 20 mushers and about 150 sled dogs participated, but Balto -- seen here with musher Gunna Kaasen -- led the final lap and received most of the credit. He became the second most famous dog of the era. (In popularity, nobody could beat Rin Tin Tin.)