User blog comment:Kaloneous/Mass Effect 3 Ending DLC Denied and PAX/@comment-1841436-20120320221509/@comment-118213-20120321034636

"If you watch the clip you can clearly see the Mass Relays fall apart. Not vapourised. Which emans not a particle left." -

True. Though that doesn't present the ability to create a new mass relay by method of reverse engineering. Remember even the Council's investigation into the remains of Sovereign turned up nothing useful.