Fortune Senior Editor at Large Pattie Sellers revealed the 2014 Most Powerful Women list on CBS This Morning on Thursday. She explained why IBM (IBM) CEO Ginni Rometty is No. 1 in the Fortune rankings — and how General Motors (GM) chief Mary Barra is seizing this period of crisis at the auto giant to transform a poisonous corporate culture. The remarkable ascension of one of Home Depot’s (HD) Anne-Marie Campbell, from cashier to Southern division president, captivated CBS Morning Show co-host Gayle King.