The food police have gone snacking at BWI Thurgood Marshall and the nation's other busy airports and have not been so pleased with everyone's offerings in the health and veggie departments.

BWI ranked closer to the bottom of the 17 busiest airports for healthy fare. The two other DC area airports -- Dulles and National -- did worse.

BWI ranked 13th with just 71 percent of its restaurants serving at least one healthy meal. 

Detroit got a perfect score from the nonprofit Physicians Committee for Responsible Medicine., which promotes preventive medicine and does clinical research. San Francisco got Most Improved. Diners there could easily find healthy, cholesterol-free vegetarian meals.  

The goup's dietitians examined food served at the nation’s busiest airports and found that 79 percent of the restaurants there now offer at least one low-fat, high-fiber vegetarian entrée. This is the first year (out of nine) that the report gave an airport a perfect score. That was Detroit's Metropolitan Wayne County.

“Greasy airport food is often as big a pain for travelers as long lines or baggage fees,” says Susan Levin, the group's director of nutrition education “Low-fat, high-fiber vegetarian meals can help prevent many common health problems, and healthy eating can even make passengers feel less frazzled.”

The group says meatless meals can decrease tension and improve mood.

The restaurants got a point if its menu included at least one low-fat, cholesterol-free vegetarian entrée. The group came up with the final score by dividing the airport’s number of restaurants serving health-conscious fare by its total number of restaurants.

The actual rankings are on the next page.