then the horses. the chopper herds them toward a track. these wild mustangs never knew anything but freedom. now, the gates of the makeshift corral close behind them. animal rights groups say these round ups must stop. the issue is that the wild horses should not be rounded up at all. hence the word, wild. reporter: the bom responsible for controlling herd sizes insists the number must be reduced dramatically. at this nevada round up, more than 100 horses will be taken. less than a dozen left behind. we realize ten is a low number here, but if that s what the range in this herd area can support, it is what it is. reporter: for activists, too many horses taken and what they believe is the excessive use of helicopters has turned a year s long simmering controversy into boiling anger.
than 100 horses will be taken. less than a dozen left behind. we realize ten is a low number here, but if that s what the range in this particular herd area can support, it is what it is. reporter: for activists too many horses taken and what they believe is the excessive use of helicopters has turned a year s long simmering controversy into boiling anger. helicopters are much more time efficient. we can do our management quicker, shorter period of time. that reduces that level of impact. reporter: impact is precisely the problem activists charge. at this roundup, a chopper s skid bumped a horse. here, one horse dodges the track, running for freedom. the helicopter gives chase. at this california roundup, a burrow is knocked down. isolated incidents says the b.o.m. perhaps that s true, but we were in no position to document it.
like to get on to, and here is one where you have the white house versus congress. kelly o donnell at the capital for us today. kelly, thank you very much. and now to that, the state department has echoed a earlier nato apology over the deaths of libyan citizens who were killed when a military target struck a residential district instead. nato blames what they call a quote systems weapons failure for the error, and an error that has ratcheted up the boiling anger on the streets of tripoli which is where we find tonight stephanie gosk with the latest. stephanie, the libyan government is claiming a second errant strike has killed more civilians and nato, again, denying that charge, but this is fodder for the libyan government as it tries to rally the support around its embattled dictator, isn t it? it is, peter. and you have a case today with children being killed in the early hours this morning in a strike that nato says it intended to make on one of gadhafi s high-level generals.