Britain is telling families to prepare for possible attacks on the country, which is bad news for anyone hoping tensions with Russia are cooling off.

• The UK government launched a "Be Ready" campaign urging every household to stockpile at least 3 days of food, water, batteries, and flashlights.
• The push comes from fear that Russia could retaliate against countries supporting Ukraine, including Britain, possibly through a cyberattack that knocks out power or internet for days.
• Officials say there's no specific threat detected for tomorrow, but they'd rather people prepare calmly now than panic later if something happens.
• This is the first time since the Cold War that the UK has told ordinary citizens to get ready for this kind of national emergency.

Outlook: Expect more Western governments to issue similar preparedness warnings if tensions with Russia keep rising.