. >> alejandra flores is doing well in school. she began working in the cotton fields at age 10. >> from what i've seen, there's no rules. i've seen people younger than me work in the fields, and there's no one there to stop them and tell them, "you know what, you're not supposed to be here, you're supposed to be at school. the people that hire you to do the job, the employers ask, "is she 12 is she 13," they just want their job done, and fast. on a commercial onion farm in texas we found gabriella, age nine. she is not a legal age to work. but nobody here was checking. >> so what grade are you in at school? >> second grade. the us is one of only three countries that have not ratified the un's convention on the rights of the child. and the us rules on child labor in agricultural haven't changed in over 40 years. >> some legislators have tried to raise the minimum age for farm workers. the care act of 2009 would have brought it up to 14, the same as it is for every other industry. however, this bill was opposed by the farm lobby, s