Aviation officials at London's Heathrow Airport forced a nursing mother to dump nearly four gallons (nearly 15 litres) of breast milk, including a sizable amount that was frozen, the woman says. But Jessica Coakley Martinez didn't just cry over it. She penned an outraged open letter on Facebook that has resonated with working mothers everywhere. "I normally would not post something this personal, but I do not remember the last time I felt so justly upset," she writes. In her posting, she documents the travails of breastfeeding while holding down a job that requires her to be away from