elections has ruled rahm emanuel is eligible to run for mayor. his opponents say because he lived in washington for two years he did not meet the residency requirement. the board said he never terminated his chicago residence. a remarkable discovery in siberia, anthropologists unearthed the pinky bone of a small girl and tests show she may be part of a previously unknown species of prehistoric humans. how cool is that? ♪ as the clouds go drifting by ♪ >> reporter: there you have it, annual prechristmas tradition on the floor of the new york stock exchange today, traders stopped what they were doing to sing the century-old song "wait until the sun shines." it's believed the tradition dates back to the depression, sanjay. >> nice to hear them take a little break like that. randi, we've got one more story for you, one we wish we didn't have to report.