Call a specialist
Be cautious rather than venturing into the unknown. The crew knew that the only thing to do now was to call in a specialist to examine the object.
With no other option, they made the call. Five days after the specialist visited the site and performed some tests, the authorities would be forced to make the decision. Should we evacuate the city or not? The question arose and time passed. However, at this point, the public was not aware of what was going on. So what could have been so terrifying and dangerous for the specialist and city officials?