I am certain that soda has a lot to do with this problem, as does the increasing portion size and energy density of foods at home and restaurants.  I am certain we have a problem.

Currently, about 25 percent of 17- to 24-year-olds are too overweight for military service. Also, the Department of Defense spends an estimated $1 billion per year on medical care for weight-related health problems.
Mission: Readiness is the nonprofit, nonpartisan national security organization of senior retired military leaders calling for smart investments in America's children. It operates under the umbrella nonprofit Council for a Strong America.

Read their recently released report, Still Too Fat to Fight - HERE