In Twitter hack, Pentagon learns perils of social media exposure

By Phil Stewart WASHINGTON (Reuters) - If so-called "cyber jihadists" want to launch another social media attack on America's military, they will have plenty of targets: the U.S. Army alone lists more than 2,000 links to feeds on Facebook, Twitter, YouTube and other accounts. In the wake of Monday's breach of U.S. Central Command's Twitter and YouTube feeds by apparent sympathizers of the Islamic State militant group, U.S. officials updated passwords and some distributed