  We demonstrate fluorescence microscopy of individual fermionic potassium
atoms in a 527-nm-period optical lattice. Using electromagnetically induced
transparency (EIT) cooling on the 770.1-nm D$_1$ transition of $^{40}$K, we
find that atoms remain at individual sites of a 0.3-mK-deep lattice, with a
$1/e$ pinning lifetime of $67(9)\,\rm{s}$, while scattering $\sim 10^3$ photons
per second. The plane to be imaged is isolated using microwave spectroscopy in
a magnetic field gradient, and can be chosen at any depth within the
three-dimensional lattice. With a similar protocol, we also demonstrate
patterned selection within a single lattice plane. High resolution images are
acquired using a microscope objective with 0.8 numerical aperture, from which
we determine the occupation of lattice sites in the imaging plane with 94(2)\%
fidelity per atom. Imaging with single-atom sensitivity and addressing with
single-site accuracy are key steps towards the search for unconventional
superfluidity of fermions in optical lattices, the initialization and
characterization of transport and non-equilibrium dynamics, and the observation
of magnetic domains.
