SEC investigating fake Steve Jobs heart attack claimsAn unsubstantiated report of Apple CEO Steve Jobs suffering a heart attack is emboldening question marks around the notion of citizen journalism. A user identified only as "Johntw" posted a story on CNN's iReport site on Friday morning stating Jobs had been rushed to the ER as a result of a "major heart attack." The user cited "an insider" who he said "opted to remain anonymous" but was "quite reliable."