Panda twins born at Zoo Atlanta to Lun Lun - again

Lun Lun, a 19-year-old giant panda, has given birth to twins at Zoo Atlanta.

The zoo will use the same cub-swapping method as for her twins in 2013; they will rotate the cubs so they both receive care from their mother.

Lun Lun was artificially inseminated, and the father is Yang Yang, aged 18.