Oddly Horrifying on Instagram: "At 9:03 AM on September 11, 2001, live broadcasts captured United Airlines Flight 175 slamming into the South Tower of the World Trade Center. What many first assumed was a tragic accident was shattered by the second impact—proof that the U.S. was under attack. The strike ripped through the 78th to 84th floors, trapping hundreds and driving fire and debris down through the building. Survivors spoke of shaking walls, collapsing ceilings, and smoke-choked stairwells