The Iran war has strengthened Ukraine in surprising ways. Could a ceasefire with Russia be closer? When Ukrainian President Volodymyr Zelensky, serious-faced and clad in black, strolled down a lilac carpet in Saudi Arabia in March, it marked a moment in the US-Israeli war in Iran. In a post on X, he said his visit was to strengthen the protection of lives. Zelensky, who carries the weight of Ukraine's own war with Russia on his shoulders, has been seizing the moment, flying to the Gulf to publicly showcase the international value and marketability of Kyiv's learned-on-the-battlefield military nous in drone warfare. Ukraine says it has now signed deals with Saudi Arabia, the UAE and Qatar - all hit by Iranian missiles and drones in recent weeks - to share drone expertise and technology, tightening alliances and benefitting from business - and it hopes defence deals - with wealthy US-allied countries.

Activists sailed to Gaza to deliver aid, but were met with drone attacks and imprisonment. "All of this preparation, all of this work--it's actually come together and we're sailing east, finally," said Dane Hunter. Get your news from a source that's not owned and controlled by oligarchs. Last fall, hundreds of activists from all over the world crowded onto several dozen boats and set sail for Gaza. They thought that by sharing their journey through social media, they could capture the world's attention.

What are Russia's gains from the Iran war? 'We are not losers; we are winners' Russia has continued heavy attacks on Ukraine for the past 24 hours, with several coming overnight on Thursday and in the early hours of Friday. At least one person has been killed and several have been injured. A Russian drone attack overnight damaged port infrastructure in Ukraine's southern Odesa region and wounded two people in the Black Sea port city of Odesa, regional Governor Oleh Kiper said on Friday morning. Two high-rise residential buildings were damaged in the attack, which destroyed apartments and caused fires, Kiper wrote on the Telegram messaging app. "This night, Russia again massively attacked the civilian infrastructure of the Odesa region: two people were injured," he said.

What are Russia's gains from the Iran war? 'We are not losers; we are winners' What do Ukraine's robot soldiers mean for the future of warfare? In a scene reminiscent of a computer war game, three battle-fatigued soldiers, dressed in white snow camouflage, emerge from a war-torn alley with their hands raised above their heads. They crouch down, following the orders being blasted at them, fear and shock etched across their faces as they stare down the barrel of a machinegun mounted on a so-called ground robot. In April, Ukrainian President Volodymyr Zelenskyy said that, for the "first time in the history of this war, an enemy position was taken exclusively by unmanned platforms - ground systems and drones". "Ground robotic systems have already carried out more than 22,000 missions on the front in just three months," he wrote in a post on X, alongside images of green machines with tank tracks and weapons mounted on top.

Representation learning based on multi-task pretraining has become a powerful approach in many domains. In particular, task-aware representation learning aims to learn an optimal representation for a specific target task by sampling data from a set of source tasks, while task-agnostic representation learning seeks to learn a universal representation for a class of tasks. In this paper, we propose a general and versatile algorithmic and theoretic framework for active representation learning, where the learner optimally chooses which source tasks to sample from. This framework, along with a tractable meta algorithm, allows most arbitrary target and source task spaces (from discrete to continuous), covers both task-aware and task-agnostic settings, and is compatible with deep representation learning practices. We provide several instantiations under this framework, from bilinear and feature-based nonlinear to general nonlinear cases. In the bilinear case, by leveraging the non-uniform spectrum of the task representation and the calibrated source-target relevance, we prove that the sample complexity to achieve ε-excess risk on target scales with (k)2 v 22ε 2 where k is the effective dimension of the target and v 22 (0,1] represents the connection between source and target space. Compared to the passive one, this can save up to 1dW of sample complexity, where dW is the task space dimension. Finally, we demonstrate different instantiations of our meta algorithm in synthetic datasets and robotics problems, from pendulum simulations to real-world drone flight datasets. On average, our algorithms outperform baselines by 20% 70%. 1

China will ban the sale of drones in Beijing and require permits to fly them under new rules that take effect on Friday. Drones and key components will be prohibited from being sold, rented or brought into the Chinese capital. Drone owners will also be required to register their devices with the police. China has gradually tightened regulations on drones in recent years, with authorities citing public safety concerns. Drones and flying taxis are part of the so-called low-altitude economy, a strategic priority for China that is expected to generate more than two trillion yuan ($290bn; £217bn) by 2035.

Why is Israel still in southern Lebanon? A war to shape Lebanon's future How Hezbollah's fibre optic drones test Israel's sophisticated radar system In the skies over the Lebanese town of Taybeh, Israel's multibillion-dollar defence systems were rendered useless by a spool of cable, according to a report by the Israeli daily Yedioth Ahronoth (Ynet). As an Israeli medical evacuation helicopter rushed to rescue soldiers wounded in a drone attack, another unmanned aerial vehicle (UAV) hurtled towards them. With their electronic countermeasures failing, soldiers on the ground were forced to point their rifles at the sky, firing at the incoming threat before it detonated just metres away. The chaotic scene underscores a lethal new reality in the escalating conflict.

Japan's Terra Drone expands investment in Ukraine drone sector A soldier from Ukraine's Taifun unmanned aerial vehicle unit holds a new model Marsianin attack drone on April 7 in Kharkiv region, Ukraine. Tokyo-based Terra Drone is expanding its investment in Ukrainian interceptor drones as it looks to bring battlefield-tested technology back to Japan to tap into a multibillion-dollar defense budget for unmanned systems. On Tuesday, Terra Drone CEO Toru Tokushige said the company was entering a new strategic partnership with Ukraine's WinnyLab to develop fixed-wing interceptor drones. It comes after the company announced in March that it would make an investment in Ukraine's Amazing Drones to develop vertical take-off interceptor drones. "Starting with interceptor drones we are looking for products that are good for increasing the defensive power of Ukraine and also the defensive power of Japan," Tokushige said in an interview.

Global military spending is up again, according to SIPRI's latest report showing the 11th consecutive year of growth. But it's based on open data and not everything makes the list. Ukrainian drones strike Russia's Tuapse refinery for third time

US lawmakers gave King Charles III a standing ovation upon mentioning the importance of "checks and balances" on executive power during his historic speech to Congress. Ukrainian drones strike Russia's Tuapse refinery for third time