The Medicare Coverage Database (MCD) contains all National Coverage Determinations (NCDs) and Local Coverage Determinations (LCDs), local articles, and proposed NCD decisions.
USS CONSTITUTION. The Constitution--called Old Ironsides because cannonballs could not penetrate her tough oak sides--was one of the first of the original six frigates that made up the U.S. Navy. A 44-gun frigate built at the Edmond Hartt Shipyard, Boston, MA, in 1797.
When Old Ironsides was being built, white oak was plentiful throughout the Union's 13 states. Blacklocust (Robina seudoacacia) Uses: Treenails (pronounced trunnels) to pin the ship's timbers together.