We here at “Pushing the Envelope” want to wish all our readers a very happy, healthy, and safe Fourth of July. On this day we mark the 246th anniversary of the signing of the Declaration of Independence — a document that heralded the start of our great experiment in democracy. Since then, the United States has become a beacon of hope and freedom throughout the world. Later this month, the U.S. Postal Service will mark its 247th anniversary. That’s right, July 26, 1775 — the day the Second Conti