President George W. Bush, left, walks with Saudi King Abdallah, right, during his arrival at Royal Terminal King Khalid International Airport, Monday, Jan. 14, 2008 in Riyadh, Saudi Arabia.
President George W. Bush and King Abdullah bin Abdul Al-Aziz stand for their national anthems Monday, Jan. 14, 2008, after the President arrived at Riyadh-King Khaled International Airport in Riyadh, Saudi Arabia. White House photo by Eric Draper
Members of the Saudi Honor Guard stand in formation during arrival ceremonies for US President George W. Bush at Royal Terminal King Khalid International Airport, Monday, Jan. 14, 2008 in Riyadh.
President George W. Bush, second from the right, shakes hands during a receiving line as Saudi King Abdallah , far right watches at the King Khalid International Airport, Monday, Jan. 14, 2008 in Riyadh, Saudi Arabia
does the color they wear signify their position? Like King...prince, etc?