Two teens barred from US flight for wearing leggings

Two girls were barred from flying on a United Airlines flight in the US from Denver to Minneapolis on Sunday because they were wearing leggings.

A third girl, aged 10, wearing grey leggings had to cover herself with a dress before she was allowed to board the flight by the gate agent.

Shannon Watts, founder of the anti-gun violence organisation Moms Demand Action, was boarding the flight and started to tweet about the incident.