US officials were aware of up to four Chinese surveillance balloons, beyond one that flew over the continental US and was shot down in February, according to leaked top intelligence. One balloon flew over a US carrier strike group located in the Pacific Ocean, in an incident that was never reported. The information comes from documents that were allegedly leaked by Massachusetts air national guard member Jack Teixeira that were first reported by the Washington Post. The other balloon crashed into the South China Sea. The leaked intelligence also states that US officials had remaining questions about the February Chinese…