lastmomentsalive on Instagram: "At 9:03 AM on September 11, 2001, live cameras captured United Airlines Flight 175 slamming into the South Tower of the World Trade Center. Many believed the first crash was a tragic accident—until the second impact confirmed the unthinkable: America was under attack. The plane tore through floors 78 to 84, instantly trapping hundreds as fire and debris rained through the building. Survivors recalled shaking walls, collapsing ceilings, and smoke-filled stairwells.