The death of Vladimir Putin's fiercest critic, Alexey Navalny sparked questions around what's next for dissent and opposition in Russia. CNN's Matthew Chance reports from Moscow.

Russia's influence reaches deep into the British establishment and successive UK governments have failed to act - that is the stark warning issued in testimony to a parliamentary inquiry on Russian infiltration into British politics. Multiple sources have told CNN that the cross-party intelligence and security committee were told that Russia has built up a network of friendly British diplomats, lawyers, parliamentarians and other influencers across the political spectrum. The full parliamentary report has yet to be published by the UK government, causing angry questions in the Houses of Parliament as

Read CNN's Fast Facts on major rail accidents since 1900.

As Ukraine's fight against Russia enters its third year, the country's forces are outmanned and outgunned. A Ukrainian sergeant tells CNN's Christiane Amanpour there is a catastrophic shortage of people and weapons on the frontline.

CNN's Katie Polglase breaks down CNN's exclusive reporting.

A US-Russian dual citizen was arrested in Russia on charges of treason for allegedly donating just $51 to a Ukrainian charity, her California employer said. Russia's Federal Security Service (FSB) said the detainee, a 33-year-old woman who lives in Los Angeles, was arrested in the Russian city of Yekaterinburg for "providing financial assistance to a foreign state in activities directed against Russia security." CNN's Fred Pleitgen has the details.

Christiane Amanpour speaks to Diane Foley, whose son James Foley was murdered by ISIS, and author Colum McCann, about their new book "American Mother".

Isa Soares speaks with Grandi about the humanitarian crisis in Gaza, as more than 75% of Gaza's population is now displaced.

Christiane Amanpour meets a Ukrainian sergeant, who tells her there is a catastrophic shortage of people and weapons on the frontline, and she witnesses how soldiers at a rehab center are being given a second chance at life

Isa Soares speaks with Admiral Rob Bauer, Chair of the NATO Military Committee, who says the lack of western aid and ammunition is now NATO's combined problem.