Senior staffers at the Securities and Exchange Commission spent hours surfing pornographic websites on government-issued computers while they were being paid to police the financial system, an agency watchdog says. The SEC's inspector general conducted 33 probes of employees looking at explicit images in the past five years, according to a memo obtained late on Thursday by The Associated Press. The memo says 31 of those probes occurred in the 2 years since the financial system teetered and nearly crashed. It was written by SEC Inspector General David Kotz in response to a request from U.S. Senator Charles Grassley. An...