President Bush is on his way to Europe to meet with European leaders in an effort to rebuild relations damaged by the U.S.- led war in Iraq.
Brussels is the first stop on a five day, three nation tour that will also take Mr. Bush to Germany and Slovakia.
Belgian officials have mounted an unprecedented level of security for the U.S. president's visit, which is drawing protesters. Mr. Bush arrives late Sunday.
While in Brussels, the president is to meet with European Union and NATO leaders for talks expected to focus on trans-Atlantic ties, the Middle East, and Iran's nuclear program.
He will also hold separate talks this week with Iraq war opponents, including French President Jacques Chirac, German Chancellor Gerhard Schroeder and Russian President Vladimir Putin.
President Bush is also due to meet with Iraq war allies, including British Prime Minister Tony Blair.
Some information for this report provided by AFP and Reuters.