Exploring the viaduct

Sakharov said that the researcher who knew about Prophet's Star disappeared somewhere near the viaduct at CNPP-2.
== Walkthrough ==
The scientist is dead, and his body can be found inside one of the viaduct sections. Here's the route:
After picking up the PDA from the scientist's body, Marked One and Proper70 will have a radio exchange.
Report to Proper70.
== Notes ==
== Bugs ==