This week, we talk to Liz Salguero, co-executive director of Circle of Care, a nonprofit organization with strong New Canaan ties that she launched more than 20 years ago when her then-3-year-old son was diagnosed with leukemia. Here on Facebook and here on Instagram, Circle of Care offers programs and services that meet the unique and challenging needs of childhood cancer treatment. The nonprofit organization will hold one of its main fundraisers— "CARE to Laugh"—on April 3 in Fairfield.