In this piece movements in latitude (Y-axis), longitude (X-axis) and time (vertically on Z-axis) are plotted in a three dimensional virtual space. Colors help to differentiate the multiple years of the project. Any time off the surface of the Earth is represented by a white line linking the points of contact before and after flight. The main cluster of lines running vertically (Z-axis) through the space is centered on Philadelphia until 2005 then shifts to Richmond VA and Urbana IL.