UN's Ban: Climate change 'defining issue of our time'
United Nations Secretary-General Ban Ki-moon marches with hundreds of thousands of people in New York for the international day of action on climate change. Rough Cut (no reporter narration).
Pope Francis is greeted by cheering crowds in predominantly Muslim Albania on his first official European visit, before launching his strongest criticism of Islamist militants to date. Vanessa Johnston reports.
Katy Perry teased her former teenage crush as she returned to her Santa Barbara high school to perform for students. In a break between songs Katy poked fun at Shane Lopes, the "most popular kid in my class" at Dos Pueblos High School for not wanting to date her.