Nope, sorry the conclusion was supplied earlier in the staement, and by someone else.<quoted text>
"Are there more things that we can do,...." - this is the portion of the sentence that necessitates the question mark.
"where there's a potential for self-radicalization at this - OF THIS SORT?" (emphasis mine)- this portion of the sentence is clearly a conclusion - of that there is no question.
...What we also know is that the Russian intelligence services had alerted U.S. intelligence about the older brother as well as the mother, indicating that they might be sympathizers to extremists. The FBI investigated that older brother. It’s not as if the FBI did nothing. They not only investigated the older brother; they interviewed the older brother. They concluded that there were no signs that he was engaging in extremist activity. So that much we know.
And the question then is, was there something that happened that triggered radicalization and actual — an actual decision by the brother to engage in the attacks that we — the tragic attack we actually saw in Boston, and are there things — additional things that could have been done in that interim that might have prevented it?