Talk to Petra

Speak to Petra Venj at the Vestian Outpost.
"Petra, wanted to wait. To be sure. Taken are searching. Seeking out wreckage of Awoken Fleet. Wreckage of the Queen's flagship. They seek survivors. Oryx believes not all Awoken were slain that day. Some may yet live." - Variks, secure comm signal to Petra Venj
Added In
The Taken King (2015.09.09)