In this paper. we study implementation in settings where agents take strategic actions that influence preferences over mechanism outcomes and yet are hidden from the mechanism designer. We show that such settings can arise in entry auctions for markets. and that the Vickery-Clarke-Groves Mechanism is not guaranteed to be truthful because of strategic actions. https://parisnaturalfoodes.shop/product-category/beard-balm-bergamot-w-ylang/