Historic Moment = Time Travel Op

Today's inauguration of the 44th President of the United States, Barack Obama, was not just historic from a present time perspective but, one must assume, to those in the future. When people muse about where they'd go if they could travel back in time, they most often seem to talk about going back to see Jesus, or being in Dallas when JFK was shot or watching Boston win the World Series. But in the future this will one of those moments. The day and time that the first African-American was sworn in as the leader of the most powerful nation on earth. So if time travel ever is invented, it stands to reason a number of future time jumpers will be setting their dials to show up on the Washington Mall in time to catch the show. And with the huge throngs that were there, who would be the wiser? So I urge the webheads of the 21st century to start pouring over the media pictures of the day.
Look at all those people. Carefully. And see if there are any anomalies that stick out -- pants made out of artificial denim, a wristwatch with a really big dial or maybe mottled skin that would be a telltale sign of someone from Earth's future where there is no ozone layer and the average surface temperature of the planet is around 125° due to global warming. Should you find any evidence like that, forward it to me. Then just lock your doors and hunker down -- the time police will be on their way.