Working group looked at more than 100 studies done since 2001 . The researchers found that the risk of developing Alzheimer's disease was about three times higher for people who drank one to two cups a day compared with those who did not drink any caffeine. More federal funds needed for medical services for at-risk groups , panel says . After September 11 , most of lower Manhattan was covered in thick dust from the collapsed towers . Watch 9/11 memorials in New York and Washington on CNN.com Live .
Working group looked at more than 100 studies done since 2001 . The researchers found that the risk of developing Alzheimer's disease was about three times higher for people who drank one to two cups a day compared with those who did not drink any caffeine. More federal funds needed for medical services for at-risk groups , panel says . Watch 9/11 memorials in New York and Washington on CNN.com Live .