NEW: President Trump says ongoing talks are Iran's "last chance" for a deal, with negotiations focused on reopening the Strait of Hormuz and denuclearization, a

NEW: President Trump says ongoing talks are Iran's "last chance" for a deal, with negotiations focused on reopening the Strait of Hormuz and denuclearization, as one person is now reported missing after an unidentified projectile struck a Liberia-flagged ship in the strait. This marks the fourth att…