1/1 Attacks

The 1/1 Attacks were a series of bombings against the Terran Commonwealth on numerous key Commonwealth buildings, including the United Nations Space Command's headquarters in Sydney, the Orion Congress building in Geneva, and the former UN building in New York. The exact perpetrators of the attacks are unknown safe for a number of individuals throughout known space.

Overview
On January 1st, 2491, nine hours after New Year's Eve, a hijacked civilian aircraft crashed into the UN building on Earth, killing everyone on board. The crashed plane found itself stuck inside the building, and so, moments before the plane crashed into the building, the hijackers activated a timer that would detonate the bombs planted inside the plane. A minute after its collision, the plane exploded, destroying the building and killing anyone who was unfortunate enough to be caught in the crossfire.

An hour later, a similar incident happened at Geneva when another plane crashed into the Orion Congress, though everyone in the building was evacuated after the planet was placed under UNSC lockdown. Another plane also crashed into the UNSC's headquarters in Sydney, but like the case with the Orion Congress, all of its staff had been evacuated accordingly thanks to the facility's AI who had warned HIGHCOM about the impending attack on their headquarters.