"We need more net.a.humans to help us install--" Dramatic Pause
Lass plugged a small device into the television, which came to
life showing some diagrams. Sammy and Daniel whistled. "This."

"I'm sure Contraption Boy and Analytic are very impressed", said
Blackbird, "but for most of us, these diagrams are completely
meaningless. Care to educate us?"

Contraption Boy was the one to speak up, however. "It's a
mesh-networked, AI-powered hive of force field generators. They
would work together to compensate any kind of attempt to get
past them. Matter, energy, anything... although this one seems
to be programmed to let sunlight through."

"For a very strict definition of sunlight, yes", said a soldier
who had just arrived. "We don't want to kill everyone in there,
after all. If we let in the right kind of solar power,
Net.ropolis can exist as a closed ecosystem for some
time... well, until they run out of food and water, I guess."

"Wait a minute", said Bonnie. "You seriously want to isolate
the whole city?"

"Those are the orders from the President, madam."