The U.S. Postal Service and HBO teamed up in promotion of the television series JOHN ADAMS. Visitors to http://www.PowerOfTheLetter.com chose from one of six greeting cards, which carried quotes from John Adams and his wife. The promotion mimicked letters written by John and Abigail, who exchanged more than 1,000 letters in their lifetimes. A sweepstakes on the site offered the chance to win a trip to Colonial Williamsburg, one of the locations where “John Adams” was filmed. The USPS supported the effort with movie-style posters and signage in 12,765 post offices, reaching 6.9 million each day. It also printed the famous quote by Adams, “Let us dare to read, think, speak and write,” and used the Web site as a special cancellation mark on 3.3 billion pieces of mail and 225 million post office receipts. The Postal Service used the partnership to promote letter writing and extend its own $30 million image ad campaign “Today's Mail.” The promotion generated the highest-rated HBO original film in four years, drawing 4.7 million viewers.