- "He's fixated on the missiles, but the codes are constantly being changed."
"Do we have an ally?"
"Ultron's got an enemy; that's not the same thing. Still, I'd pay folding money to know who it is."
"I might need to visit Oslo. Find our unknown."
- ―Nick Fury, Tony Stark and Natasha Romanoff
Oslo is the capital city of Norway.
Norse Paganists Riots
Nystrom, Larsen and a group of about a dozen of their followers destroyed many properties and left at least 20 injured, three in critical condition, proclaiming themselves to be gods in a message spelled out on the streets of Oslo.
- "He still going after launch codes?"
"Yes, he is, but he's not making any headway."
"I cracked the Pentagon's firewall in high school on a dare."
"Yeah, well, I contacted our friends at the NEXUS about that."
"It's the world internet hub in Oslo. Every byte of data flows through there; fastest access on Earth."
- ―Tony Stark, Nick Fury, Steve Rogers and Bruce Banner
The Avengers learned from Nick Fury that someone was actively preventing Ultron from gaining access to nuclear codes. Tony Stark went to the NEXUS base in Oslo to find out who their ally was, who was revealed to be the remnants of J.A.R.V.I.S., with Stark managing to recover the remains.