Ranchers in Texas, alongside the U.S. Department of Agriculture, have been bracing for the return of the New World screwworm (NWS), a parasitic fly that lays its eggs in the wounds of warm-blooded animals and, once newly hatched, eats living flesh.

Secretary of energy Jennifer Granholm and secretary of health and human services (HHS) Xavier Becerra on December 20 jointly certified that the worldwide supply of the medical radioisotope molybdenum-99 produced without the use of high-enriched uranium is now sufficient to meet the needs of patients in the United States.