NASA on Tuesday unveiled an ambitious plan to establish a permanent base on the moon, laying out a roadmap for sustained human presence on the lunar surface and future missions to Mars.The announcement, made during a Moon Base event at NASA Headquarters in Washington, marks a major milestone in the agency's Artemis program and its long-term goal of creating what officials describe as humanity's first outpost on another world."For all we hope to accomplish in this endeavor, what we are...