Hello. Today we're in Japan amid protests in major cities as the country shifts away from its pacifist constitution and where the past is casting a long shadow.

In Serbia we hear the story of a woman who found herself at the centre of a national

tragedy and her subsequent fight for justice. And we're in Canada, where robots are on patrol in the

Arctic Circle, but do they really have the edge over their human counterparts? But first to Moscow,

where the Kremlin has recently increased security measures around President Vladimir Putin after a string of assassinations of top Russian military figures.

Mr. Putin has been seen less in public view, with fewer of his usual pronouncements of military

successes and projections of

strength. The government also imposed internet restrictions in recent weeks, fueling public

discontent, but the authorities say it's a necessary step in countering drone attacks.

And as Russia marks Victory Day across the country, commemorating the

Soviet defeat of the Nazis, today's parade in Moscow has been scaled back, amid fears it could

be targeted. Steve Rosenberg has observed the shift in the country's mood. On several occasions recently,

I've seen things which have made me think something rather unusual is happening right now inside Russia.

For example, on my way to work at 6 o'clock in the morning,

a couple of times now I've spotted heavily armed police removing manhole covers

in the centre of Moscow, and with the help of

sniffer dogs inspecting what's below. On bridges near the Kremlin, I've seen masked soldiers

armed with anti-dron guns that are set up on the back of trucks. They're ready and waiting,

in case the heart of Russian power comes under aerial attack.

But perhaps the most surprising thing I've seen is a joke.

It appeared in Kamsa Molskaye Pravda, a popular tabloid that is fiercely loyal to the authorities,

a very pro-Putin paper.

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