All flights from major carriers, including Delta, American, and United, were grounded Friday morning following a massive global technical outage that affected several industries.

The issue reportedly follows an update made by cybersecurity firm CrowdStrike, one of the world’s largest software providers. The disruption caused computer systems using Microsoft Windows to see nothing but the “blue screen of death.” 

Prominent security consultant Troy Hunt said of the disruption, “This will be the largest IT outage in history.” He also noted, “This is basically what we were all worried about with Y2K, except it’s actually happened this time.”

The outage had a global impact, with outages being reported in the UK, India, Germany, and the Netherlands in addition to the United States. 

“We acknowledge how impactful this is for our customers, and we’re working to still receiving obstructions as soon as possible,” Microsoft said in a statement Friday morning, per People.

“The system was sent an update and that update had a software bug in it and caused an issue with the Microsoft operating system. And we identified this very quickly and remediated the issue. As systems come back online and they’re rebooted, they’re working,” founder and CEO of CrowdStrike George Kurtz said during a Today Show interview on Friday morning.

He added, “We’re deeply sorry for the impact that we’ve caused to customers, to travelers, and to anyone affected by this including our company. It is our mission to make sure that every customer is recovered. We’re not going to relent until we get every customer back to where they were.”

“This is not a security incident or cyberattack,” Kurtz clarified. “The issue has been identified, isolated, and a fix has been deployed.”

The outage could impact businesses ranging from airlines to banks, TV stations, healthcare organizations, hotels, and others, and they might lose millions in revenue due to the disruptions. Independent cybersecurity consultant Lukasz Olejnik told Wired this incident should serve as a warning.

“It reminds us about our dependence on IT and software,” Olejnik said. “When a system has several software systems maintained by various vendors, this is equivalent to placing trust on them. They may be a single point of failure—like here, when various firms feel the impact.”

Former President Donald Trump recounted the assassination attempt against his life for the first time in a speech to the Republican National Convention (RNC) on Thursday night.

Trump took to the stage on the final day of the RNC to accept the GOP nomination for president less than a week after a gunman’s bullet tore through his right ear. He recounted the harrowing moment, which took place on Saturday at a campaign rally in western Pennsylvania, for what he said would be the last time “because it’s actually too painful to tell.”

The former president had just taken the stage at the rally in Butler and was referencing immigration numbers shown on a screen to the side when he was shot.

“In order to see the chart, I started to … turn to my right and was ready to begin a little further turn – which I am very lucky I didn’t do – when I heard a loud whizzing sound and felt something hit me really, really hard on my right ear,” Trump said. “I said to myself, ‘Wow, what was that? It can only be a bullet,’ and moved my right hand to my ear, brought it down. My hand was covered with blood, just absolutely blood all over the place.”

As the president dropped on stage in cover, Secret Service agents rushed to shield him.

“These are great people at great risk, I will tell you, and pounced on top of me so that I will be protected,” Trump said, adding that he felt the presence of God protecting him.

 “There was blood pouring everywhere and yet in a certain way I felt very safe because I had God on my side,” Trump said, evoking cheers from the audience.

“The most incredible aspect of what took place on that terrible evening in the fading sun was actually seen later,” Trump said. The crowd of thousands of his supporters at the Pennsylvania rally did not, generally, fall into chaos or stampede, which could have injured many more people.

“This massive crowd of tens of thousands of people stood by and didn’t move an inch. In fact, many of them bravely but automatically stood up looking for where the sniper would be. They knew immediately it was a sniper, and then began pointing at him,” Trump said.

The former president said that while he was down on the stage, covered by Secret Service agents and bleeding through his right ear, he could see the concern written across the faces of the crowd.

“They didn’t know I was looking out. They thought it was over. But I could see it and I wanted to do something to let them know I was okay,” Trump recounted. “I raised my right arm, looked at the thousands and thousands of people that were breathlessly waiting, and started shouting, ‘Fight, fight, fight.’”

“Once my clenched fist went up, and it was high into the air – you’ve all seen that – the crowd realized I was okay and roared with pride for our country like no crowd I have ever heard before. Never heard anything like it,” Trump said. “For the rest of my life, I will be grateful for the love shown by that giant audience of patriots that stood bravely on that fateful evening in Pennsylvania.”