MICHAEL J. CASEY writes for "The Wall Street Journal", covering global finance in his "Horizons" column. He is a frequent contributor to the "Journal's" MoneyBeat blog and co-authors the daily "BitBeat" with Paul Vigna. He is the host of the book-themed video series "WSJ Afterword" and a frequent guest on and host of "The News Hub" and "MoneyBeat." Casey has written for such publications as "Foreign Policy, The Washington Post", and "The Financial Times". He is the author of two books: "Che's Afterlife: The Legacy of an Image "(Vintage, 2009), one of Michiko Kakutani's "best books of 2009," an...