This is the best film I’ve ever watched on why our will power is not enough. It is fascinating, discouraging and a call to arms. I highly recommend it:

ABCNewsstore.com: SPECIAL: Peter Jennings Reporting – How To Get Fat without Really Trying…

In this important hour-long special, Peter Jennings reveals how government policies and food industry practices are helping to make Americans fat. 

Obesity is fast on its way to becoming the nation’s largest and most costly public health problem. While much of the public debate about obesity has focused on personal responsibility, PETER JENNINGS REPORTING: HOW TO GET FAT WITHOUT EVEN TRYING reveals how federal government agricultural policies and food industry practices are contributing to America’s growing obesity epidemic.
In this program, Jennings demonstrates for the first time how more federal agricultural subsidies are going to foods Americans should be eating less, while few subsidies go to foods we should be eating more. Jennings investigates the type of food products the packaged food industry introduces each year and finds that the vast majority of new food products are those that dietary guidelines say Americans should be eating least.
Jennings also takes a bold look at the marketing of unhealthy food to children. Studies reveal that young children are not capable of understanding the intent of advertising and Jennings questions the ethics of such marketing, raising the question: should children be protected from junk food marketing—despite the economic impact that might have on food companies and broadcast networks?

This was a special program in 2003 and sadly every bit of it is still true today!
You can buy this film at ABC news or watch it in segments on Youtube.com OR here:

http://www.snagfilms.com/films/title/peter_jennings_reporting_how_to_get_fat_without_really_trying/