From NYSE to Delhi Metro, the day the world decided to shut down

Experts have said that the reason behind the New York Stock Exchange shutting down on 8 July was due to a failed system upgrade. About two weeks ago, NYSE informed the firms about its plans to discount some legacy systems. At the start of the process, the whole NYSE was disconnected for nearly four hours. The system upgrade was rolled out before the opening bell on Wednesday. This is the fourth trading suspension at the NYSE caused due to technical problems in the last 15 years.

But it wasn't just the NYSE that was freaking out.

Delhi Metro: There was a snag in Delhi Metro that left over 2,000 people stuck for over two hours. According to Delhi Metro Rail Corporation officials, an overhead wire snapped near East-Delhi's Laxmi Nagar station around 6:15 pm. Some passengers had to force open emergency doors and subsequently cross tracks on foot. This resulted in 15 more trains being stuck in tunnels.

Chinese Stock Exchange: The Chinese stock market virtually came to a halt as almost half of the listed companies voluntarily suspended their trading shares and over 800 others had their shares automatically suspended after reaching the daily drop limit.

New York City subway: The subway travellers suffered a brutal commute today. Some of the trains left passengers stranded in stations for long periods without any explanation.

United Airlines: The third largest airline in the USA, was forced to ground its flights after its computer system inexplicably stopped working. The Federal Aviation Administration blamed the "automation issue" for the travel delays.

Wall Street Journal: After the NYSE, the WSJ's website also mysteriously stopped working.

Washington DC: In the United States capital, more than 2,500 people lost power for no explainable reason.

Greg Keeley, Cyber-Security expert, said that the North Koreans are taking credit for the "glitch" that hit the NYSE.

This comes days after Amazon Web Service was down for just an hour on 30 June. The glitch that hit AWS affected services such as Netflix, Slack, Pinterest and others.