As William and his team blindly ran outside, unknown to them the Reaper had closed in on their position and was directly over their heads. – A single beam fired in front of them, destroying the Cerberus dropship and cutting off any means of escape. Husks fell from the sky in uncountable number, chagrining at the mercenaries.

Suddenly an alarm at the entrance of the vault began to sound. After a moment, a great grinding sound emitted from the large doors as they slowly began to seal.

Meanwhile in the Greater Vault the other Keepers began to make their way to what appeared to be some form of service elevator, highlighted by green strobing lights. Turrets deployed from the ceiling and pointed towards the entrance of the vault, they too began to close.
“We must hurry; we have only but a few moments.” Sha’shi said. “Then we must board.” 

Alex turned to Sha’shi, slightly confused.

“What do you mean ‘board’?” He asked.

“We must escape by the only means that will not result in permanent death.” Sha’shi replied as he typed at the console. “I shall begin the data stream to The Last Stand now.”