Online usage in the U.S. fell in September, according to Nielsen/NetRatings. Average online time per user fell by 2 minutes to 32 minutes, while active online users fell by 1.8 million to 110.8 million. The decline was blamed in part on the attacks of September 11, the affects of which were also felt sharply by ecommerce sites. News sites, in contrast, experience a large boost in traffic.