NBC’s Tom Costello visits a secret site in Virginia where Microsoft uses encryption, firewalls, anti-virus software, and more to secure and protect data stored in the cloud.

President Trump invites Russian President Vladimir Putin to the White House, just days after controversial conduct at the 2018 Helsinki Summit. The announcement surprises the Director of National Intelligence, Dan Coats, who learns about the invitation to the Russian president live on stage at the 2018 Aspen Security Forum.

A 2018 study from the University of Southern California links screen time with attention deficit hyperactivity disorder (ADHD) after tracking 2,500 10th graders. The students most most addicted to social media sites were 53% more likely to develop ADHD symptoms.

World War II veteran Waitman Kapaldo takes part in a special ceremony honoring the crew members of the USS Laffey more than 70 years after it was attacked by kamikazes, killing 32 crewmen, during the battle of Okinawa. He is accompanied by his great grandson and other family members on the destroyer that he once proudly served aboard. This video is part of an NBC News series "Those Who Serve."

Experts say there’s a bias against women in the U.S. healthcare system, from the way medicines are researched and tested, to the way doctors diagnose and treat diseases.

Following backlash over his dismissal of Russia's interference in the 2016 presidential election, President Trump walks backs his comment, saying, "I said the word ‘would’ instead of ‘wouldn't.’ The sentence should have been ‘I don't see any reason why it wouldn't or why it wouldn't be Russia.’” President Trump made the comments at the 2018 Helsinki Summit with Russian President Putin, sparking intense criticism about the president's lack of faith in his own intelligence community.

Mandalay Bay Hotel owner MGM International Resorts is suing the victims of the 2017 Las Vegas massacre, the deadliest shooting in modern U.S. history. The company, who is not seeking money, is wanting the victims’ lawsuits thrown out by the federal court, citing protection under the 2002 Safety Act which shields a company in the events of a terrorist attack if the business relied on security measures certified by the Department of Homeland Security. On October 1, 2017, a gunman opened fire on an outdoor concert in Las Vegas, Nevada, killing at least 58 people and injuring more than 520 others, before taking his own life. This story contains violent footage that may be upsetting to viewers.

In the age of internet streaming, VHS videos and DVDs are becoming obsolete, marking the end of an era in home entertainment. Bend, Oregon, is home to the last Blockbuster video store and nostalgia is making it an unlikely tourist attraction.

"Prime Day" offers Amazon Prime members access to deeply discounted products, but during 2018, the site crashed just minutes in as shoppers flooded the site looking for deals. The mishap could threaten the estimated $3.6 billion Amazon is expected to make.

Following President Donald Trump's dismissal of Russia's interference in the 2016 presidential election, there is heated backlash from both Republicans and Democrats, including Senator John McCain, who called the meeting “one of the most disgraceful performances by an American president in memory.”