Kmack; Your article/link posted on NioCorp board! Stole it and am posting here! (Thanks!) Canadian company, but still potentially part of the N American supply chain.
(Hafnium was listed prominently at the top. Search Mineral drillings have found Zirconium/Hafnium Mineralization in one of their target drillings.) From
The New CREEs (their oxides termed by Adamas Intelligence as "neo-CREOs") have been identified as Neodymium (Nd), Praseodymium(Pr), Europium (Eu), Dysprosium (Dy),Terbium (Tb) and Lanthanum. This valuable subset of the complete series of seventeen rare earth elements is considered critical due to high demand and/or constrained domestic supply. Containing unique properties which enhance the performance of a range of innovative technologies, CREE are essential components in the development of permanent magnets and a variety of other components used in renewable energy, green technology automobiles, medical devices, consumer electronics and industrial and military applications."