things. comparable incidents of knife attacks. it means that it looks like the previous one by scenario, but we cannot determine the motives of the perpetrator. so for this reason, the authorities in great britain are sending the message that the scenario that they've seen on that bridge, which by the way is telling many experts that the british public is reacting differently because of that knowledge from past cases and the british security forces have reacted much faster than before. but of course they have to wait for two things. number one to determine the identity of the person and the minute they determine the identity the few hours after that they'll determine social media possible connections but that's early at this point in time. >> connell: let's go back to june of 2017 as you say is the compareson that people are making even though the situation is different. the comparison is being made