Legal Battle Over Nevada Mustang Roundup Continues As 31 Horses Die

The federal government is capturing wild horses in Nevada, with 31 dying so far.
The government says culling the herds is necessary, but advocates say the deaths are inhumane.
A lawsuit alleges the roundup violates a 1971 law requiring humane treatment.
Advocates claim the roundup lacks transparency and uses outdated environmental reviews.
A judge will hear the case brought by horse advocates against the federal government's actions.