we speak to our correspondent there, jonathan marcus. are they giving out a message that they've stepped up intensity? >> not directly, but that's certainly been the message from the actual operations over the past week or so. about a week ago, nato extended its operations for another 90 days, another three months, and almost immediately we've seen a greater intensification of attacks, particularly on command centers in this rather large compound, complex in the libyan capital tripoli itself. also, we've seen the use of british and french attack helicopters, but clearly the aim put it arriving here this morning is to try to get a greater sense of urgency in some quarters in the alliance. the alliance hopes that it can get this operation over with within the next three-month period. >> but, of course, there is plenty to suggest, jonathan, that this could go on and on and on. >> well, there is. it's very difficult to know how and when this would end. clearly one could wake up and find colonel gaddafi had been the victim of an air strike. p