ABC News' David Muir, anchor of "World News Tonight" and co-anchor of "20/20," celebrates the 40th Anniversary of "20/20" with Mario Batali in "The Chew" kitchen. Chef Lovely, the Queen of the Kitchen at Glen Feliz Elementary, where she teaches the benefits of healthy eating, joins Clinton Kelly in the kitchen. Michael Symon answers viewers' pleas with simple tips to solve their dilemmas.