Editing Toaru Majutsu no Index:RailgunSS2 Chapter8 (section)

=== Part 6 ===

At the same time, the small UAV that had taken off in Tokyo Bay raised its altitude slightly.

It had to in order to cross Academy City’s outer wall.

The outer wall was made to emit a highly directed jamming signal pointed vertically in order to prevent information from being leaked.

As such, a signal sent from outside the walls would not reach anything inside Academy City.

The instant the UAV passed directly above the outer wall, its flight grew slightly unstable.

But the UAV continued flying while it shook.

It held the signal needed to detonate the hydrogen bomb within it.

The UAV took the final action needed to detonate the Solntse which had been recovered by Anti-Skill.

It passed the outer wall.

It passed the jamming signal.

The UAV entered Academy City. It reached an area where nothing would block its signal. The UAV had a clear connection to the Solntse.

And…

The explosion…