Security has been increased at key British installations in the region since Sunday's early-morning raid, with troops now on high alert for drone attacks, as well as missile and rocket bombardments.
Security officers from private firms are being paid to patrol some UK neighbourhoods in an effort to deter to burglars - but how much can they really do?
California Senator Alex Padilla began shouting over Homeland Security Secretary Kristi Noem before he was forcibly removed from the room by multiple guards and placed in handcuffs.
Homeland Security Secretary Kristi Noem touted a Mexican national's arrest for writing the letters about Trump before prosecutors said an inmate penned them.