Ms. Langley talked about her book Tearing Down the Walls: How Sandy Weill Fought His Way to the Top of the Financial World. . .and Then Nearly Lost It All, published by Free Press. In the book, Ms. Langley tells the story of CitiGroup Chairman Sandford Weill by tracing his career on Wall Street and analyzing his management tactics along the way. Sanford “Sandy” Weill, a rough-edged kid from Brooklyn who transformed financial services in America, helped lay the groundwork for the current vertically integrated (and scandal-ridden) financial industry. Starting with a small brokerage, Mr. Weill built several business empires that culminated in the $83 billion 1998 merger that put him atop the global financial services leviathan Citigroup, an unprecedented agglomeration of investment and retail banks, insurance companies, consumer loan corporations and stock brokerages. I