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LightSquared to Be Blocked by U.S. on Interference Report

The U.S. Federal Communications Commission vowed to block LightSquared Inc. after the Obama administration found the wireless venture backed by hedge-fund billionaire Philip Falcone would disrupt navigation gear.

Federal agencies determined that LightSquared’s signals interfere with global-positioning system devices, Tammy Sun, an FCC spokeswoman, said yesterday in an e-mailed statement. The agency is preparing to withdraw the preliminary approval it granted last year for the company to build a high-speed network serving as many as 260 million people, Sun said.