 According to the Transportation Department, the number of travelers filing complaints is up a lot. It received nearly 97,000 last year. That's about 10,000 more than the previous year. More than two-thirds were about U.S. airlines, but a quarter related to foreign airlines. Complaints about the treatment of passengers with disabilities rose by more than a fourth, and complaints about discrimination were also up. The department said there were so many complaints, it took until July to sort through all the filings and compile all the figures.