The ongoing conflict in Ukraine is often described as the world's first drone war. It has led to a continuing huge growth in the production of military drones, both within and outside Ukraine. Before Russia's invasion of Ukraine Kseniia Kalmus was a floral artist. Now, she makes drones for use against the Russians. It was just an obvious decision for me, she tells the BBC from the Ukrainian capital.

Prime Minister Shigeru Ishiba (right) attends a joint news conference with Sri Lankan President Anura Kumara Dissanayake at the Prime Minister's Office on Monday. Prime Minister Shigeru Ishiba and Sri Lankan President Anura Kumara Dissanayake met in Tokyo on Monday and agreed that Japan will provide about 10 surveillance drones, worth about ¥500 million ($3.36 million), to the South Asian nation's navy. This will be Japan's first provision of defense equipment to Sri Lanka under its official security assistance program. The stability and development of Sri Lanka, which is located at a strategic point in the Indian Ocean, is extremely important, Ishiba said at a joint news conference after the meeting. In response, the president voiced his commitment to creating a peaceful and stable Indo-Pacific region.

A solar-powered surveillance drone with a wingspan larger than a Boeing 747 jumbo jet could fly for weeks or months at a time, according to its operator, while watching for drug-smuggling vessels, pirates or naval warships. It has been performing test flights off the US Gulf Coast this month. The Skydweller drone, operated by US-Spanish firm Skydweller Aero, has a wingspan of 72 metres – exceeding the width of most commercial passenger jets. But it weighs only about 2500 kilograms – as much as a Ford F-150 truck. It is based on the Solar Impulse 2 aircraft, which performed the first solar-powered flight around the world in 2016. Skydweller Aero purchased and converted the pioneering aircraft with the goal of building a fleet of similar solar-powered, carbon-fibre drones capable of "perpetual flight" at altitudes exceeding 13 kilometres in daytime hours.

Members of Ukraine's 1st Separate Assault Battalion describe themselves as firemen. Their job is to rapidly deploy to areas along the front that are in danger of collapse. Lately, their service has been in high demand: the front is burning. A large-scale counter-offensive last year failed to achieve meaningful victories, and since then Russia has been on the attack. One of its priorities appears to be Kupyansk, a city in northeastern Ukraine, some twenty miles from the Russian border.

Ukraine has been fighting Russia for two years to liberate its lands and drive Russia back – but supply, tactics and the flat terrain have meant that the much-vaunted Ukrainian counteroffensive of last year has produced few tangible results. In the wide-open agricultural land of southern Ukraine, there is not much in the way of cover for an attacking force. Russia had months to prepare its defences, and built them in depth. Row after row of trenches, anti-tank obstacles, ditches and reinforced bunkers have formed a barrier, often kilometres deep, effectively containing Ukrainian forces as they have repeatedly tried to break through into the open country beyond, with little success. The counteroffensive has bogged down into slow, attritional warfare, as Russia's strategy of making Ukraine pay for every metre it tries to take is showing signs of succeeding.

Intensified spying by American drones near Ukraine could lead to an escalation and Russia will respond proportionally to future intelligence-gathering operations, Moscow's defence chief has told his US counterpart. The comments came in a phone conversation on Wednesday between Sergei Shoigu and Pentagon boss Lloyd Austin after the United States accused a Russian Su-27 fighter jet of colliding with one of its Reaper surveillance drones, forcing it to crash into the Black Sea. Russia denied it deliberately brought the unmanned aerial vehicle down. "It was noted that flights by American strategic lethal drones by the Crimea coastline were provocative in nature and created pre-conditions for an escalation of the situation in the Black Sea zone," a defence ministry statement quoted Shoigu as saying. "[Russia] has no interest in such a development, but it will continue to respond proportionately to all provocations."

Republican Rep. Greg Steube weighs in on the U.S.'s announcement for an additional $775 million in new Ukraine military aid, along with the impact of illegal immigration on Florida's coastal border. The U.S. reportedly is set to provide Ukraine with M982 Excalibur munitions. "These precision-guided munitions will aid Ukraine's counter-offensive against Russia, which is focused on targeting ammunition depots and military installations," foreign relations expert, Samuel Ramani, tweeted. "Scan Eagle surveillance drones, which the U.S. also provides, will amplify their impact." The Ukrainian outlet appeared to draw from reporting by Politico, tweeting: "A source close to the deliberations of the latest military aid package shared with Politico that the M982 Excalibur rounds, traveling up to 70km, will be sent to Ukraine'at some point in the future.'"

One week into its invasion of Ukraine, Russia massed a 40-mile mechanised column in order to mount an overwhelming attack on Kyiv from the north. But the convoy of armoured vehicles and supply trucks ground to a halt within days, and the offensive failed, in significant part because of a series of night ambushes carried out by a team of 30 Ukrainian special forces and drone operators on quad bikes, according to a Ukrainian commander. The drone operators were drawn from an air reconnaissance unit, Aerorozvidka, which began eight years ago as a group of volunteer IT specialists and hobbyists designing their own machines and has evolved into an essential element in Ukraine's successful David-and-Goliath resistance. However, while Ukraine's western backers have supplied thousands of anti-tank and anti-aircraft missiles and other military equipment, Aerorozvidka has been forced to resort to crowdfunding and a network of personal contacts in order to keep going, by getting hold of components such as advanced modems and thermal imaging cameras, in the face of export controls that prohibit them being sent to Ukraine. The unit's commander, Lt Col Yaroslav Honchar, gave an account of the ambush near the town of Ivankiv that helped stop the vast, lumbering Russian offensive in its tracks.

A successful deployment of drones provides an ideal solution for surveillance systems. Using drones for surveillance can provide access to areas that may be difficult or impossible to reach by humans or in-land vehicles gathering images or video recordings of a specific target in their coverage. Therefore, we introduces a data delivery drone to transfer collected surveillance data in harsh communication conditions. This paper proposes a Myerson auction-based asynchronous data delivery in an aerial distributed data platform in surveillance systems taking battery limitation and long flight constraints into account. In this paper, multiple delivery drones compete to offer data transfer to a single fixed-location surveillance drone. Our proposed Myerson auction-based algorithm, which uses the truthful second-price auction (SPA) as a baseline, is to maximize the seller's revenue while meeting several desirable properties, i.e., individual rationality and incentive compatibility while pursuing truthful operations. On top of these SPA-based operations, a deep learning-based framework is additionally designed for delivery performance improvements.

China on Tuesday showed off its increasingly sophisticated air power including surveillance drones and jets able to jam hostile electronic equipment, with an eye on disputed territories from Taiwan to the South China Sea and rivalry with the United States. The country's biggest airshow, in the southern coastal city of Zhuhai, comes as Beijing pushes to meet a 2035 deadline to retool its military for modern warfare. China still lags the United States in terms of tech and investment in its war machine, but experts say it is narrowing the gap. On Tuesday, a prototype of a new surveillance drone able to carry out attacks -- the CH-6 -- was among domestic tech unveiled in Zhuhai. China's WZ-7 high-altitude drone for border reconnaissance and maritime patrol has already entered service with the air force, according to state media Photo: AFP / Noel Celis With a wingspan of 20.5 metres (67 feet) and 15.8 metres long, the drone can carry missiles and is designed for surveillance and strike operations, according to open source intelligence agency Janes. Other debutants include the WZ-7 high-altitude drone for border reconnaissance and maritime patrol, as well as the J-16D fighter jet which can jam electronic equipment.