Few passenger delays amid airport security 'threat'
3 July 2014 Last updated at 18:53 BST
UK airports have have shown few signs of check-in delays, despite warning from the US to tighten security amid a "credible" terrorism threat.
Reports suggest groups with links to al-Qaeda in Syria and Yemen are developing bombs to smuggle onto planes which may not be detected using normal screening techniques, prompting fears of longer and more thorough security checks.
Richard Westcott assessed the impact of the threat on passengers at Manchester Airport.