Former FDNY Chief Joseph Pfeifer was on a routine run in lower Manhattan when he saw a plane aim and crash into the World Trade Center on September 11, 2001. Pfeifer was initially in charge at the scene and made critical decisions that likely saved thousands of lives.

Visit http://science.nasa.gov/science-news/science-at-nasa/2011/16­mar_supermoon/ for the full story.

With the tide of war in Ukraine turning against Putin and Russia, worries about a nuclear attack have increased interest in a fixture of the Cold War: underground bunkers.

There is overwhelming evidence that humans are experiencing the effects of climate change, says a new report. Unless serious action is taken, this is likely to get worse, with growing risks of floods, food shortages, and threats to human health, warns the United Nation's Intergovernmental Panel on C...

16 climate activists teens and children are petitioning the United Nations with claims that the boy is violating children's rights by not taking action on climate change and global warming. Global climate strike leader Greta Thunberg is among the activists taking climate action against the UN. Thunb...

Pop superstar Lady Gaga performs a rendition of “The Star Spangled Banner” at the inauguration of President-elect Joe Biden and Vice President-elect Kamala Harris.

20 years after being killed in an anti-gay hate crime in Wyoming, Matthew Shepard will be laid to rest at the Washington National Cathedral. Shepard's October 1998 death became an important symbol spotlighting the discrimination experienced by the LGBTQ community.

Ruth Bader Ginsburg has died. The second woman to serve on the Supreme Court, she had powerful opinions that made her a cultural icon. She was 87.

NBC News’ Dr. John Torres breaks down what you need to know to stay safe as the COVID-19 coronavirus continues to spread around the world. "It belongs to a large family of viruses called coronaviruses. These viruses can cause respiratory illnesses such as the common cold, and more severe illnesses s

“It is with deep sorrow that Her Majesty The Queen has announced the death of her beloved husband, His Royal Highness The Prince Philip, Duke of Edinburgh. His Royal Highness passed away peacefully this morning at Windsor Castle. The Royal Family join with people around the world in mourning his los