  We demonstrate arbitrary coherent addressing of individual neutral atoms in a
$5\times 5\times 5$ array formed by an optical lattice. Addressing is
accomplished using rapidly reconfigurable crossed laser beams to selectively ac
Stark shift target atoms, so that only target atoms are resonant with
state-changing microwaves. The effect of these targeted single qubit gates on
the quantum information stored in non-targeted atoms is smaller than $3\times
10^{-3}$ in state fidelity. This is an important step along the path of
converting the scalability promise of neutral atoms into reality.
