It's not every day the president of the United States of America comes to your county. But President Barack Obama will be here today with South Korean President Lee Myung-bak to tour the GM Assembly Plant in Orion Township.

1. The president's trip will be historic: 

The appearance is planned to celebrate a trade pact with South Korea approved by Congress this week; under the agreement, the United States will be able to export products to South Korea. Cars at the Orion Township plant are built with parts from South Korea. Louis Rocha, vice president of the UAW Local 5960, said he and others at the plant are excited to watch "history in the making."

2. Prepare for traffic:

Heading into northern Oakland County? Beginning at 1:50 p.m., the two presidents will tour the plant and then address a crowd of workers and media. There are likely to be traffic delays in the area of M-24, as well as Silverbell, Brown and Giddings roads, shortly before and after the scheduled appearance. (Take special note if you plan to attend the 11 a.m. Disney on Ice performance at The Palace, which is right along the president's expected travel route.)

3. Michigan, again? 

Obama last visited Michigan on Labor Day, when he spoke to a hopeful Detroit audience about jobs. It's tough to guess when he'll be back in our state, but according to news reports, he will have Michigan on his radar again next month when he watches Michigan State play North Carolina in the Nov. 11 Carrier Classic basketball game aboard the USS Carl Vinson.

4. He knows how to say Orion: 

In January, Obama visited another Orion — Orion Energy Systems in Manitowoc, WI. Unlike our Orion, that Orion is pronounced 'o-RYan,' and he was criticized for mispronouncing it (like our 'OR-ion') in a speech there.

5. It's a private event:

About 300 plant workers were chosen in a lottery drawing to attend the address. Although local dignitaries are likely to be in attendance (and we're wondering if former vice president Al Gore stuck around from an appearance at Wayne State University on Thursday night), the event is not open to the public. Air Force One is due in at noon, so check back for live coverage of events on Patch beginning around 11 a.m.