About two decades ago, NPR host Mary Louise Kelly had her first child and went down the extremely common yet commonly daunting life path of balancing a demanding career with a family. As a national security correspondent on assignment war zones, she missed family events and emergency phone calls from her kids’ school. As the daily weekday co-host of “All Things Considered,” she missed almost all of her sons’ soccer games. She’s tried working full time, working part time, working from home and working far away from home, and in each, there’s been something missing. Every year, she said she would figure it out next year. But as she writes in her latest book, the memoir “It. Goes. So. Fast.: The Year of No Do-Overs,” next year came quickly. Her sons were about to leave for college, and she had to make the most of the time they had left. Kelly talks with podcast and TV host Kelly Corrigan, host of PBS’ “Tell Me More with Kelly Corrigan,” about the constant challenge of trying to be there for your family and your job at the same time.