A private jet owned by a North Texas company has been impounded for the past 2 1/2 weeks and its passengers and crew detained by the Congolese government in central Africa, where officials say it was used to smuggle gold from rebel territories in the nation's eastern provinces. The plane was leased by Southlake Aviation, based in suburban Dallas-Fort Worth, to a subsidiary of CAMAC International, The Dallas Morning News reported in its Sunday editions. CAMAC company is owned by Kase Lawal, a Nigerian-born Houston oil tycoon an appointee of President Barack Obama to the Advisory Committee for Trade Policy...