possibility. and we know they have attacked a number of american interests over the course of the last days. >> it's very likely that your e-mails are being read? >> it's very possible. there's no way for me, and i certainly write things with that awareness. >> so late this afternoon, a senior administration official declined to comment on kerry's assertion, saying the administration is aware that malicious actors often target personal e-mail accounts of government leaders. there was no talk of hillary clinton's e-mails in that exchange. a rash of arrests recently of americans intending to join isis terrorists. correspondent laura ingle takes a look from new york tonight. >> reporter: federal investigators have rounded up more alleged isis sympathizers over the last several days here in the u.s. over the weekend, 19-year-old jaelyn young and 22-year-old mohammed daklala were arrested in columbus, mississippi, attempting to board an international flight. according to investigators, young, an american citizen, who