A14-year-old boy killed in a samurai sword attack as he walked to school Tuesday in London was unaware of warnings that he was in danger because he was wearing headphones, according to a report. A neighbor of Daniel Anjorin said the man wielding the sword had initially confronted her before turning his sights on the teenager,the Independent reported on Thursday. “We were shouting and waving towards Daniel as he came out. He had his headphones in so he wouldn’t hear us. It just happened right before our eyes, it was horrible,” Auiste Dabasinskaite said. Marcus Ardiuni Monzo, 36, has been charge…