van mowed down many in barcel a barcelona's most popular district. that left 13 dead, one american, and 120 injuries. are we getting better at detecting these attacks before it happens? the top democrat on foreign relations committee, senator ben cardin. senator, welcome back to "fox news sunday." >> good to be with you, bill. thank you. >> i have a number of things that i want to go through in the next 10 minutes. first on spain, it's clear there was a well-established network operating around barcelona. what can you tell our viewers about your level of confidence about being able to stop the networks before they kill, whether it's abroad or here at home? >> first, our prayers go out to the families, the victims, and you hope those that are injured will make a full recovery. what the trump administration needs to do is articulate a strategy that uses the tools