A security expert has claimed Russia 'could well be' behind a cyber attack that crippled operations at several major European airports today. Hackers targeted check-in and boarding systems operator Collins Aerospace on Friday night, sparking major disruption, flight delays and cancellations at transport hubs across the continent. The company is 'experiencing a technical issue which may cause delays for departing passengers' as a result of the attack, which crippled online check-in systems at Heathrow, Berlin and Brussels. One expert told the Daily Mail that Russia could be behind the hack, adding: 'The timing of the attack, coming just hours after...