ABC News Chief Investigative Correspondent Aaron Katersky reports on the ongoing health challenges faced by Sept. 11 first responders and details the security measures in place at Ground Zero.

Twenty-five years after Sept. 11, 2001, ABC's David Muir looks back on the day that changed America, and the hope in a phone call decades later.

Families honor loved ones 25 years after 9/11

New York City skyline shines bright, 25 years after 9/11 terror attacks

One of the first responders at the scene of the deadly plane crash in Miami speaks out about what he saw while searching for survivors. ABC News' Andrew Dymburt reports. #news

President Trump's decision to impose 50% tariffs on many Canadian products before the midterms is reverberating across northern border states and congressional districts where cross-border trade and tourism are major economic drivers. That includes communities in New York's 21st Congressional District, where Republican Rep. Elise Stefanik is not running for reelection and the growing trade war is top of mind as Democrats seek to flip the seat.