It's a milestone on the road to adulthood and many young people are marking it this weekend as they leave home for university or college. It can be hard for parents to let go and for kids to stop relying on Mom and Dad to deal with all their problems. Where is the balance? Harlan Cohen is the author of "15 Things Parents of First Year College Students Should Never Do". Libby Znaimer reached him in Chicago. AND At 42, Measha Brueggergosman is an internationally renowned soprano and the mother of two small children. But she is also the survivor of two major cardiac events. Ten years ago she nearly died from a dissected aorta, and just this June, in the midst of a hectic performance schedule, she suffered a heart attack followed by emergency bypass surgery. She stopped by our studios to talk about her recovery.