Preservationists protesting Postal Service's efforts to sell old buildings, cut losses

The financially strapped U.S. Postal Service is running into opposition from historic preservationists as the agency tries to cut losses by selling off buildings.

The postal service lost $15.9 billion last year, after losing $5.1 billion in 2011 -- as online services continue to replace money-making mail deliveries.

Hundreds of post offices are on the National Register of Historic Places, which largely protects them from being demolished, or are protected under deals with new owners....