The following are the top stories in the Wall Street Journal. – Thermo Fisher Scientific Inc is nearing a deal to buy pharmaceutical-testing company PPD Inc for more than $15 billion, according to people familiar with the matter, in what would be the latest tie-up among companies that run clinical trials and provide other services for drugmakers. – The Justice Department has stepped up an antitrust probe of American Airlines Group Inc’s recent partnership with JetBlue Airways Corp and is concerned the deal could lead to anticompetitive coordination and inflated fares at key traffic hubs, according to people familiar with the matter.
