his family said he had mental issues. the attack seemed to be fairly unsophisticated. it is difficult what to make of these new arrests, christine. according to the british appreciate association, two teenagers arrested on tuesday, they were questioned and then released. you may also remember the liverpool bombing in november. that was another terrorism incident. three men in that case were arrested, questioned and released later on when they realized they had nothing to do with this. it is difficult to know without more evidence, more information whether or not these arrests are any kind of a sign of a wider plot or a current threat, christine. all right, scott mclane, keep us posted if there are any new developments. thanks, scott. laura? just ahead, the world making life for the unvaccinated tough. and a stern warning for the beijing olympics. those who break a long-standing rule risk punishment. as a barista during rush hour. and a nanny to a couple of rambunctious kids.