Egypt suffered a weekend blackout from the Internet and some phone systems after their under water cables were severed. The cause is yet unknown but its not an unprecedented incident, ship's anchors being the common cause.
Made me think though, it wouldn't surprise me if we saw purposeful activity like this as a tactic in war. Information is key, and people have become accustomed to knowing what's happening in times of conflict. Whilst it is highly unlikely that an army is reliant on public cabling, it would certainly add further disruption to a country already under pressure.
Happy Christmas thoughts!