Lis Wiehl (pronounced like "lease wheel") is a former federal prosecutor and law professor, turned TV legal analyst and author. Her new book, "A Spy in Plain Sight" is an excellent read about the incredible, horrendous, and unbelievably frustrating story of gov't incompetence surrounding arguably the most harmful spy in American history: FBI agent Robert Hanssen, whose sales of information to Russia cost the US tremendously, including in lives of our own intelligence assets. I highly recommend you buy and read this book.