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EU cyber agency says airport software held to ransom by criminals
Brussels Airport asks airlines to cancel nearly half of their outgoing flights on Monday.
Several of Europe's busiest airports have spent the past few days trying to restore normal operations, after a cyber-attack on Friday disrupted their automatic check-in and boarding software. The BBC has seen internal crisis communications from staff inside Heathrow Airport which urges airlines to continue to use manual workarounds to board and check in passengers as the recovery is ongoing. The BBC understands about half of the airlines flying from Heathrow were back online in some form by Sunday - including British Airways, which has been using a back-up system since Saturday.
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