joining us now here in washington, white house chief of staff denis d.n.a. donna, thank you soap much for finding time to talk us to. >> i'm happy to be here. >> schieffer: does this change anything? >> you know, we were obviously painfully aware of their barbarity and their nefariousness even before this video but this obviously underscores it yet again. a development worker, aide worker after two journal cyst, all people who had only the search for truth. this is what isil has done. really showed their true colors. >> schieffer: what was the president's reaction? >> you saw what the president said last night which he obviously condemned this in the strongest possible terms. but also underscored our resolve to stand firm shoulder to shoulder with the united kingdom but also with this coalition to include muslim country from the region to take this fight to isil to degrade and ultimately destroy them. >> schieffer: can we expect a strong reaction soon? >> you can expect a continued, strong, steady reaction against this threat so that we degrade it and ultimately d