Horizon science of graphical perspective. Assuming the picture plane stands vertical to ground, and "P" is the perpendicular projection of the eye point "O" on the picture plane, the horizon is defined as the horizontal line through "P". The point "P" is the vanishing point of lines perpendicular to the picture. If "S" is another point on the horizon, then it is the vanishing point for all lines parallel to "OS". But Brook Taylor (1719) indicated that the horizon plane determined by "O" and the horizon was like any other plane: The peculiar geometry of perspective where parallel lines converge in
No Line on the Horizon to the halfway point. "Moment of Surrender" closed every show. U2 made minor changes to the setlists for the second leg of the tour. "No Line on the Horizon" was performed later in the concerts, while "Unknown Caller" was dropped for several weeks before being revived towards the end of the leg. The band did not play "Stand Up Comedy", "Fez – Being Born", "White as Snow", or "Cedars of Lebanon" at any point in 2009. The 25 October 2009 concert at the Rose Bowl in Pasadena, California, U2's penultimate concert of 2009, was filmed and streamed live over YouTube.