Atlanta (AP)- A battle is brewing over a new, ultra-fast wireless Internet network. Device makers, public safety officials and the Pentagon say they worry it could interfere with everything from airplanes to police cars. A Virginia company called “LightSquared” is building a nationwide broadband network using airwaves on a band next to those used for GPS. Opponents warn that the planned network could jam existing systems. There is disagreement on how expensive a technical fix might be and there’s no agreement on who should pay. Government officials pledge to block LightSquared from turning on its network unless they receive assurances it won’t cause a problem. The Federal Communications Commission approved it, seeking to boost wireless competition and bring faster and cheaper Internet connections to all parts of the country.