NBC News
| December 19, 2012
Polio health workers killed in Pakistan
After receiving threatening telephone calls warning they would regret helping the "infidel" campaign against polio, a group of woman, working on a UN-backed polio vaccination campaign, were shot and killed by gunmen a day after a similar slaying in Karachi. Ch4 Europe’s Lindsey Hilsum reports. Warning: Some images maybe disturbing.