  We show how by reassembling the tree level gluon Feynman diagrams in a
convenient gauge, space-cone, we can explicitly derive the BCFW recursion
relations. Moreover, the proof of the gluon recursion relations hinges on an
identity in momentum space which we show to be nothing but the Fourier
transform of the largest time equation. Our approach lends itself to natural
generalizations to include massive scalars and even fermions.
