Bolivia's Senate approved nationalization contracts with foreign oil companies during a hastily called session that ended early Wednesday morning. The deals, which were signed last month, were drawn up according to the terms of President Evo Morales' May 1 nationalization of Bolivia's petroleum industry. The agreements grant Morales' government a majority share of foreign companies' revenues generated in Bolivia as well as control over their operations in the country. Companies signing contracts include Brazilian state energy giant Petrobras, Spanish-Argentine company Repsol YPF, the French company Total SA, and British Gas, a unit of BG Group PLC. Bolivia's natural gas reserves...