Plea for action months after Pakistan fire

It has been more than six months since 259 people were killed in a clothing factory fire in the Pakistani city of Karachi. The fire is still considered the country's worst industrial accident. The government has promised to prosecute those who are responsible, and pay compensation to victims' families. But many surviving families are still waiting the money from government. Al Jazeera's Imtiaz Tyab reports from Karachi.