Steve Kroft investigates Allegiant Air, a discount carrier known more for its ultra-low fares than its high record of in-flight breakdowns; Salesforce CEO Marc Benioff on how his company has bridged the gender pay gap and how a commitment to equal pay requires regular commitment and monitoring.

Bill Whitaker reports on CRISPR, the gene-editing tool revolutionizing biomedical research; then, why Bill and Melinda Gates put 20,000 students through college; and, seaweed farming and its surprising benefits.