News roundup: Sales of new homes in US plunge 6.8% in June … Government investigating five airlines for price-gouging … Anthem to buy Cigna to create nation’s biggest health insurer

Sliding sales: Sales of new homes dropped 6.8% from May to June, due largely to sliding sales in the West. New single-family homes were sold at a seasonally adjusted annual rate of 482,000 in the U.S.…