  After a short review of Lattice QCD methodology and techniques, I summarize
recent results of Lattice QCD calculations of the interactions of nucleons and
light nuclei with magnetic fields at pion masses of 805 MeV and 450 MeV.
Interestingly, the magnetic moments are found to be consistent with the
experimental values when given in terms of natural nuclear magnetons. The very
low-energy cross section for $np\rightarrow d\gamma$ is calculated and found to
agree with the experimental measurement. First calculations of the magnetic
polarizabilities of light nuclei are presented, with a large isovector
polarizability observed for the nucleon at these heavier pion masses.
