Cable-slicing ships show Russia pressing on a Western weak spot

Jussi Nukari / Lehtikuva / AFP

• Russia is accused of using aging tankers to damage undersea cables.
• Analysts say it gives the cover of plausible deniability.
• But it's a method that also comes with risks.

A series of apparent attacks on undersea internet cables show Russia exploiting a Western vulnerability, analysts say.

The...