VERDICT: TRUE The claim that "NASA's New Horizons spacecraft flew past Pluto in July 2015" is fully supported by authoritative primary sources. **Source #1 — NASA Press Release (Release 15-150, July 15, 2015)** - URL: https://www.nasa.gov/news-release/nasas-new-horizons-phones-home-safe-after-pluto-flyby/ - Finding: The release explicitly states that "NASA's New Horizons spacecraft phoned home just before 9 p.m. EDT Tuesday [July 14, 2015] to tell the mission team and the world it had accomplished the historic first-ever flyby of Pluto." It quotes NASA Administrator Charles Bolden calling it "a historic win for science and for exploration." **Source #2 — NASA Technical Reports Server (NTRS), Ames Research Center** - URL: https://ntrs.nasa.gov/citations/20150018394 - Finding: This peer-reviewed NASA technical document (Document ID 20150018394) authored by Kimberly Ennico (NASA Ames) states: "On July 14, 2015, after a 9.5 year trek across the solar system, NASA's New Horizons spacecraft flew by the dwarf planet Pluto and its system of moons, taking imagery, spectra and in-situ particle data." **Additional corroborating source — Science@NASA (NASA's science mission pages)** - URL: https://science.nasa.gov/mission/new-horizons/ - Finding: Confirms that New Horizons "was the first spacecraft to explore Pluto up close, flying by the dwarf planet and its moons on July 14, 2015." The claim is fully accurate in every detail: the spacecraft (New Horizons), the event (flyby of Pluto), the month and year (July 2015), and the agency (NASA).