Lightsquared which invested about $4 billion in developing a new wireless network is facing huge losses as U.S. regulators block the proposed wireless network. Federal regulators say it will interfere with Global Positioning System devices. Investors in Philip Falcone's Harbridge Capital Partners had provided most of the funding. Before Lightsquared Philip Falcone made successful bets against the subprime mortgage market. Falcone used lobbying firms to press his position, to no avail because the GPS issue was a serious one for the federal government, as it would interfere with aircraft systems and military devices. Harbinger's biggest funds have also lost money in other fields, losing 23-27% in 2008 and Falcone had to suspend redemptions by 2009. In that situation Falcone increased his investment in LightSquared in 2010-2011. In 2011 Harbringer lost 47% in its biggest fund. Harbinger's assets declined from $26 billion in 2008 to $4 billion by Jan. 2012. The S.E.C. is now investigating his hedge fund for possible market manipulation....