SAY you are traveling with your baby on a 2 ½-hour flight. The Transportation Security Administration’s rule says you may carry on baby food and liquids in “reasonable quantities for the duration of your itinerary.”

But say you have heard about record airline delays and of some flights stranded for hours on the tarmac during bad weather. That might affect your definition of “reasonable quantities.”

Those long waits were definitely on the minds of two Boston area doctors, Anand V. Soni and his wife, Arati Pratap, last week while traveling with their 10-month-old daughter from Chicago Midway Airport to Manchester, N.H.  read more »