SPRING, Texas – One mother is outraged after she says Klein Independent School District bus drivers left her son and seven other students waiting in the cold, two days in a row. The mother said on Thursday her 6th-grade son waited over 40 minutes, but the bus never came. She claims a bus only came to pick up her son after she hounded district officials and her son was over an hour late to school. An official with the district said they were short-staffed due to bus drivers being out sick, in quarantine and on vacation. The official went on to say they had 13 bus drivers out sick Thursday, which is a normal amount.