an a on safeguarding our food supply, 24 percent give a grade of d or f, bill whitaker has more tonight continue our series cbs reports, where america stands. >> when it comes to agriculture, america is indeed the land of plenty. foods raised here and imported from around the world provide greater abundance and choice than ever before, but while our foods are bountifully, they are also in consistently regulated. the u.s. has one of the safest food supplies in the world but the report card is mixed. every year, 33 percent of canadians get sick from what they eat, in the u.s. 25 percent. but in england, it is only two, and in france, just one percent, both countries where food is grown more locally and on a smaller scale than in north america. safety always comes first in 12-year-old riley gustav's kitchen. >> i need to wash my hands. that even good food can hurt you. >> in 2006, on her ninth birthday, she ate a entertain and a half salad and was infected with the virulent strain of ecoly. >> it felt like killer pain, and my organs started to shut down. >> we panicked, you know, what is c