too overcome to go on. as the conflict escalates, more and more yemenese are expected to make the crossing. all hoping it won t be too long before they can turn around and go home. reporter: the u.n., natalie, is now ringing alarm bells over what it is calling a humanitarian catastrophe inside yemen. they are really concerned about the mass displacement of people and they are worried that more and more will take that dangerous crossing to what is essentially their closest safe haven. yes. we know that the red cross hasn t been able had trouble getting into yemen to help people who have been caught up in the fighting and you just wonder how prepared is djibouti to handle this influx of refu e