CLEAN : Police announce enhanced presence in London after tube attack

The transcript discusses an incident involving 18 injuries, mostly flash burns. The scene is secured, and the investigation is led by the Metropolitan Police Counterterrorism Command with support from MI5. Numerous detectives are involved, examining CCTV and forensic evidence, and interviewing witnesses. Londoners can expect increased police presence, especially in the transport system.

What new insight or understanding did you gain from this video?