An estimated 47 million people around the world have dementia, a decline in memory or other thinking skills severe enough to interfere with daily life. The most common form of the condition is Alzheimer's disease. Now, research shows the way you speak may indicate whether you are at risk of developing dementia. A new study says pauses and filler words may be a sign of early mild cognitive impairment, and that could help doctors diagnose Alzheimer's much quicker. VOA's Deborah Block reports.