Written by Thomas Jefferson in 1801 while he was serving as vice president (and therefore the head of the Senate), the manual influenced both houses of Congress as to how to approach order and decorum. Glenn also took with him a 13-star flag that was used to identify General George Washington on the battlefield. Believed to be inspired by the details on the General’s uniform in 1777, Washington’s Headquarters Flag (also known as the Commander-in-Chief standard) flew with Glenn in the lead up to the bicentennial commemorations of Washington’s death in 1799. John Glenn flew a replica of General George Washington’s 1777 Headquarters Flag aboard the space shuttle Discovery in 1998, in the then-lead up to the bicentennial commemorations of Washington’s death in 1799. Credit: Museum of the Ameri