Massachusetts, where this Walgreens outlet is located, is one of the three states where the chain is most concentrated. Regulators could force the company to divest itself of some stores, if its merger with Rite Aid wins approval. Steven Senne/AP hide caption

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Fiat Chrysler Automobiles CEO Sergio Marchionne has asked his counterpart at General Motors to consider a merger. Bill Pugliano/Getty Images hide caption

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Federal regulators are considering whether to approve the proposed $45 billion merger of Comcast and Time Warner Cable. Joe Raedle/Getty Images hide caption

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There were $3 trillion worth of corporate mergers in 2014. Comcast's proposed acquisition of fellow cable company Time Warner was the largest at $45 billion. Gene J. Puskar/AP hide caption

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Last month, demonstrators protested the possibility of Walgreens moving its corporate headquarters overseas at a Chicago location of the pharmacy. Scott Olson/Getty Images hide caption

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"I was scratching my head," one analyst says of news that AT&T will acquire satellite TV company DirecTV for $48.5 billion in cash and stock, or $95 per share. Analysts are mixed in their reactions to the deal. Seth Perlman, Reed Saxon/AP hide caption

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