MEXICO CITY - Reputed drug lord Osiel Cardenas was arrested Friday after a fierce firefight with Mexican soldiers, cutting short the career of a man so bold he once threatened U.S. federal agents, leading the FBI to offer a US$2 million reward for his capture. Allegedly the leader of the Gulf drug cartel and the third major drug boss to fall in the last year, Cardenas was arrested in Matamoros, across from Brownsville, Texas, Defense Secretary Gen. Gerardo Vega Garcia told a news conference. At least two Mexican soldiers were wounded, one seriously, in the shootout with Cardenas' gunmen, who...