Augmented reality, growing rapidly, will be mobile first, and will go on to change the face of business and advertising.
The Continental Congress approved the final wording of the Declaration of Independence on July 4, 1776. They'd been working on it for a couple of days after the draft was submitted on July 2nd and finally agreed on all of the edits and changes.
The Declaration of Indpendence was signed by President Hancock of the Continential Congress on July 4, 1776 in the State House of the Province of Pennsylvania. It was not called 'Independence Hall' at that time (as the outcome of the revolution was still in doubt).