▶▶ Pod 153 - Report:

The machine lifeforms not only infected the YoRHa soldier units on the ground, they also infected the <Bunker> with a viral attack, activating a self-destruct sequence.

With this, the 13th Orbital Satellite Base <Bunker> was destroyed. 

2B and 9S avoided infection from the virus and escaped the Bunker before it was destroyed. 
Proposal: Find the remaining surviving YoRHa Soldiers and start another descent-to-ground operation on Earth to fulfill the mission.
I eagerly awaited the day
she would call me "Nines."
‫انتظرت بشوق اليوم الذي ستناديني فيه بناينز.‫
Ich habe sehnsüchtig auf den Tag gewartet,
an dem du mich Nines nennen würdest.
Esperaba con ansias
el día en que me llamara Nueve.
Esperaba con ansia
el día en que me llamara Nueve.
J’attendais avec impatience
E attendevo impazientemente
Mal podia esperar por quando
ela me chamaria de "Nines".
И с нетерпением ждал дня, когда она
назовёт меня Девяткой.