Taliban insurgents shot rockets onto a U.S. base outside Kabul and targeted Afghan government buildings in a provincial capital on Friday, as they officially launched their spring offensive in a year that has already seen fierce fighting, Reuters reported. There were no casualties in either rocket attack, officials said. This year's fighting season is expected to be intense after NATO forces ended their 13-year combat mission in December. One rocket did land inside the sprawling Bagram base but caused no injuries, according the NATO-led coalition that continues to train and support Afghanistan's security forces.