Last night, President Obama gave his State of the Union Address for 2011. This is a speech that the president gives every year to give his view of the state or situation of the country. Address is another word for speech.
You can watch some or all of the address here, and you can visit the White House Website to learn more, and also to ask questions. When I visited the site, I found it interesting that the White House offers an iPhone application, so people can receive updates.