Why is Ukraine accepting aid, but I can't deliver? Why isn't NATO protecting the Black Sea port?

This is about roads and logistics: military support enters Ukraine from land, not sea, so assistance can be introduced even though Russia is doing its best to stop them from where they are headed.

There are numerous missile attacks on railway infrastructure and sirens for air strike are heard across Ukraine for many times every day.

As for grain exports: first, Russia controls sea routes; then, a large amount of Ukrainian wheat has simply been looted from Russia; some warehouses are located in occupied areas; and while there are efforts to export all this vital product via the road and railway, it is impossible to distribute it in the same capacity according to global markets.

Why is NATO not moving towards protecting the Black Sea port of Odessa, considering that the Black Sea is part of international waters?

There are many complicated reasons.

First, NATO is not directly involved in the conflict and wants to remain that way.

Second, the Montreux Convention, regulating the Black Sea naval key, gives Turkey its word on the issue of which non-Montenegro Sea states have the right to enter and exit the Bosphorus.

Turkey has more close ties with Moscow than with most NATO members (with the exception of Hungary) and wants to be seen as mediators between Russia and Ukraine. Any movement to break the Russian blockade of Odessa by force would no doubt be viewed by Moscow as a hostile movement.

Britain and Lithuania have recently indicated that they want to see a “coalition of readiness” to protect commercial inflows to Odessa, in a bid to allow Ukraine to export much needed agricultural products, especially wheat, to the world.

But plans still need to be shaped. Meanwhile, a Danish decision to supply Ukraine with American Harpoon missiles, combined with the Ukrainian local Neptune system (system responsible for the sinking of Moscow, the Russian battleship in the Black Sea) implies that, for the time being, Odessa is not expected to be attacked by the sea.

Is there any movement to get Putin out of power?

Given the extremely secret nature of the Kremlin politics, it is understandable that there are many rumors and speculation about a man at the top; after all, it is Putin who made all the major decisions in the country.

So... is Vladimir Putin seriously ill? Are knives sharpened before a royal coup? Are the oligarchs orchestrating the president's departure?

Most of this, I suspect, is desire in the share of Putin's critics. Of course, not all in the Kremlin corridors are happy with what Russia is doing in Ukraine and what international sanctions have brought to Moscow.

But, right now, there are no signs of an anti-Putin coup and that includes among the oligarchs. If you are Vladimir Putin, would you take any risks? This may explain why the head of the Russian National Guard is a former Putin guard. In all, according to Russian media, the new minister of emergency is also one.

Why does Ukraine not join NATO?

That's the question that was posed every day before this phase of war began.

In many ways, this ship has sailed. There is no possibility that NATO would allow a country in the midst of a major war to join the alliance.

Even Ukraine's biggest supporters do not want to see themselves automatically involved in a fight against Russia -- something that NATO Article 5 (an attack against a member deemed an attack on everyone) would be necessary

Ukraine no longer asks or expects to membership in the near future.

But as NATO members send more sophisticated military equipment towards Kiev, slowly replacing Soviet-era equipment with NATO standards, Ukraine is gradually becoming a member of the Western alliance.

Why isn't Ukraine attacking Russia?

This is a war Ukraine has not chosen and it has not begun. Its nature is a defence struggle: the country is fighting for its right to exist against a full Russian attack.

I don't think you can underestimate how much it cost Ukraine to stop Russia from catching Kiev and now trying to stop the Russian troops' advancement in Donbas.

Aiming openly and deliberately at Russia would be a major crossing at a time when Ukraine is struggling to hold the line.

Kiev's prayers for more weapons from the West are ongoing. But recently, the United States makes it clear that the long-range missiles to be sent will not be used for attacks on Russian territory: The US is afraid of an exit.

Remember: The West estimated it is too dangerous to place a zone-fly over Ukraine when Kiev begged for such a thing. What about targeting Russian civilians from Ukraine? That would be a war crime.

The questions were raised by some BBC readers, and the answers were provided by East European connoisseurs and journalists:

Sarah Rainsford, the correspondent from Eastern Europe, reports the war in Ukraine after more than two decades reporting from Russia.

Steve Rosenberg is an editor in Moscow and a Russian expert living there since the Cold War.

Paul Adams reported from conflicts from around the world, including Ukraine./Sokol Berisha, Periskopi