 |  | Senators scold prosecutors, Swiss bank in tax spat | WASHINGTON (Reuters) - Senators lashed out at federal prosecutors on Wednesday for a lack of zeal in going after Swiss banks that helped Americans dodge taxes, blaming them for billions of dollars in missed revenues. | |  | |   |  | Target shares recover after reassurance on data breach impact | NEW YORK/BOSTON (Reuters) - Target Corp shares made strong gains after it reassured investors that customers were beginning to return to its U.S. stores, suggesting that the impact of a massive data breach may not be as severe as some had feared. | |  | |   |  | U.S. attorney subpoenaed Mt Gox, other bitcoin businesses: source | NEW YORK (Reuters) - Manhattan Attorney Preet Bharara has sent subpoenas to Mt. Gox, other bitcoin exchanges, and businesses that deal in bitcoin to seek information on how they handled recent cyber attacks, a source familiar with the probe said on Wednesday. | |  | |   |  | Argentina hopes Repsol deal will dispel investor doubts | BUENOS AIRES (Reuters) - Two years after seizing the country's biggest energy company from Spain's Repsol, Argentina hopes a new compensation deal will lure more foreign investment to what many believe to be some of the world's most promising shale oil and gas prospects. | |  | |   |  | Facebook says makes progress targeting users | (Reuters) - Facebook highlighted on Wednesday two ad campaigns in an attempt to persuade advertisers that its massive membership base and ability to home in on specific audiences makes it a more effective advertising platform than broadcast TV. | |  | |   |  | Rolls-Royce seeks long-term uplift with new aero engines | DERBY, England (Reuters) - British engineering company Rolls-Royce has outlined plans designed to maintain long-term dominance in large aircraft engines, showcasing two new models that could improve efficiency by up to 10 percent. | |  | |  |  |  | A daily digest of breaking business news, coverage of the US economy, major corporate news and the financial markets. 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