SHARPSBURG - Antietam National Battlefield is one of the 10 most endangered battlefields in the United States, according to a list released Wednesday by the Civil War Preservation Trust (CWPT). The battlefield is "threatened with a 120-foot-tall cellular tower that would be visible from all of the battlefield's most famous vantage points," according to a CWPT press release. Monocacy National Battlefield near Frederick, Md., also is on the list, which also includes sites in several states from Virginia to Oklahoma. National Park Service officials were notified in December 2007 of a proposal to erect a stealth cell tower south of...