A Boeing 737-800 crashes while taking off from Tehran Imam Khomeini International Airport, killing all 176 people on board. The incident, which took place amid the 2019–20 Persian Gulf crisis, is under investigation.
Iran's Islamic Consultative Assembly formally designates the United States Department of Defense as a "terrorist organization" in response to the assassination of General Qasem Soleimani in a targeted killing in Baghdad, Iraq. Under the newly adopted bill, all United States Armed Forces personnel and Pentagon employees are "considered terrorists."
Amazon files a lawsuit against the United States Department of Defense for awarding a US$10 billion cloud computing contract to Microsoft. The company had previously accused the Department of bias in their decision, given CEO Jeff Bezos has been a vocal critic of U.S. President Donald Trump.
Following the U.S. military withdrawal from northern Syria, the United States is to deploy more troops to Syria's eastern Deir ez-Zor Governorate to secure the country's petroleum gas and oilfields, according to a senior Department of Defense official.
Turkish artillery mistakenly hits a contingent of United States special operations forces on Mashtenour hill in the Kurdish-majority city of Kobanî, according to a senior Department of Defense official.
A U.S. Department of Defense spokesperson says Turkey has been pulled off the Combined Air Operations Centre's air tasking order and that the U.S. has halted sharing aerial surveillance information with Turkey.
U.S. Senator Lindsey Graham strongly criticizes President Trump's decision, describing the event as "a big win for Iran and Assad [and] a big win for ISIL". Former American envoy Brett McGurk mentions the 60,000 SDF-held ISIL detainees, saying that the State Department and inspectors general at the Department of Defense warn they are the "nucleus for a resurgent ISIL".
The United States Department of Justice charges WikiLeaks founder Julian Assange with 17 counts of violating the Espionage Act, including provisions that prohibit a conspiracy to obtain, receive and disclose national defense information, attempting to crack computer passwords, and unlawful receipt of sensitive information such as State Department communications and Defense Department logs.