Turkey's 'game-changer' against IS militants

After months of reluctance, Turkey has weighed in for the first time in the fight against so-called Islamic state.

Turkish military aircraft have been carrying out air strikes against IS targets in neighbouring Syria while authorities have made a series of arrests of IS sympathisers at home.

Turkey has pledged to continue what it is calling decisive action against the extremists.

American military officials are calling the decision a 'game-changer'.

Bridget Kendall reports.