WASHINGTON, Sept. 22 — Two federal agencies announced today that they had opened investigations into JetBlue Airways in response to the airline's admission that it had provided travel records on more than a million passengers to a Pentagon contractor, violating its own privacy rules. The moves by the Department of Homeland Security and the Federal Trade Commission came as JetBlue disclosed that it had hired Deloitte & Touche, the accounting firm, to review the company's privacy policies and determine if they needed to be revamped. The fast-growing three-year-old airline, which is based in New York and has worked to...