The United States has sent specialized equipment in an attempt to locate the flight recorders of Malaysia Airlines Flight 370. Why is the equipment so important and what are its limitations? CCTV correspondent Jim Spellman reports.
Follow Jim Spellman on Twitter@jimspellmanTV
Anchor Mike Walter asks Van Gurley, Senior Manager at Metron, about the difficulties encountered during the ongoing search for the missing Malaysia Airlines passenger jet.
MORE COVERAGE OF MALAYSIA PLANE CRASH