Denmark has banned all civilian drone flights this week ahead of a European Union summit in Copenhagen, the country's transport minister said on Sunday. The ministry said the decision was made in order to simplify security work for the police, and they could not accept foreign drones creating uncertainty and disruption. Denmark is one of several European countries that have reported drone incidents in recent weeks, with unidentified drones sighted above Danish military sites as recently as Saturday. Defence ministers from 10 EU countries have agreed to create a drone wall in response to the sightings, and Nato says it has enhanced vigilance across the Baltic. In their statement announcing the ban, the transport ministry said police were on significantly increased alert ahead of this week's summit and that they needed to take care of Danes and our guests.

Legal experts analyze the challenging defense strategy for Tyler Robinson, who allegedly shot Charlie Kirk at Utah Valley University, as prosecutors prepare evidence for trial.

Men stand at the site of heavily damaged residential buildings following a Russian air attack on the outskirts of Kyiv on Sunday. KYIV - A massive Russian drone and missile attack against Ukraine lasting 12 hours into Sunday killed at least four people in Kyiv, including a 12-year-old girl, Ukrainian authorities said. Neighboring Poland scrambled jets to secure its airspace in the wake of the barrage, after NATO accused Moscow of being behind a series of violations of the defense alliance's airspace. Diplomatic efforts to stop the war have faltered, and Russia has vowed to press on with the offensive that it launched in February 2022. In a time of both misinformation and too much information, quality journalism is more crucial than ever.

A mobile radar installation is positioned near the strait between Denmark and Sweden on Friday. COPENHAGEN - Denmark will ban all civilian drone flights across the country over the coming days to ensure security as Copenhagen hosts an EU summit gathering heads of government, the transport ministry said Sunday. Mysterious drone sightings across Denmark since Sept. 22 have prompted the closure of several airports, with Denmark hinting at possible Russian involvement, though Moscow denies the charge. Drones were observed over Danish military sites Saturday night for the second straight day, Denmark's army said on Sunday. In a time of both misinformation and too much information, quality journalism is more crucial than ever.

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In observational settings where treatment and outcome share unmeasured confounders but an observed mediator remains unconfounded, the front-door (FD) adjustment identifies causal effects through the mediator. We study the heterogeneous treatment effect (HTE) under FD identification and introduce two debiased learners: FD-DR-Learner and FD-R-Learner. Both attain fast, quasi-oracle rates (i.e., performance comparable to an oracle that knows the nuisances) even when nuisance functions converge as slowly as n^-1/4. We provide error analyses establishing debiasedness and demonstrate robust empirical performance in synthetic studies and a real-world case study of primary seat-belt laws using Fatality Analysis Reporting System (FARS) dataset. Together, these results indicate that the proposed learners deliver reliable and sample-efficient HTE estimates in FD scenarios. The implementation is available at https://github.com/yonghanjung/FD-CATE. Keywords: Front-door adjustment; Heterogeneous treatment effects; Debiased learning; Quasi-oracle rates; Causal inference.