synagogue, on that day, there were families who were worshiping, others who were celebrating a bris, right? the baby-naming ceremony for their child. my mean, i, myself learned about this when i was walking out of my synagogue. and it's just absolutely wrenching. and our hearts, our prayers, our thoughts are with the community in pittsburgh, because we are all pittsburgh tonight. >> i know that the adl has been incidents in the united states for decades, for at least 40 years. and i take it there was a 57% increase in anti-semitic incidents in 2017. that's the largest single-year increase on record. what do you think accounts for this spike. >> well, i think there are multiple factors at play. as you said, we have been tracking hate for decades and decades. and we look at, through our network of 25 offices around the country, acts of harassment,