now technology has given us a way to identify autism's earliest clues. i want to give a little caution and reassurance to parents out there. it's totally normal for a baby to be looking around the room and not always focusing on your face. this is a research tool. your doctor will screen your baby as he or she gets older with tests we know work for autism. for now this is something that holds promise but isn't ready to be used. dr. richard besser, abc news, new york. fascinating. to some business news starting on wall street where the dow opens this morning at a record high with its nearly 129 point gain yesterday. the dow knocks its 33rd record close of the year. up more than 20%. the s&p 500 starts today one point below its record. the big deal today for investors, the stock market sale of twitter. $26 a share. that gives twitter a market value of $18 billion and creates possibly three new billionaires and a bunch of multi-millionaires, all early