Experts warn tear gas residue can last 3 weeks, as US reps propose ban on crowd control gear to Hong Kong police

US representatives have introduced a bill to ban the export of crowd control weapons to the Hong Kong police. The move comes as local experts found evidence of tear gas residue lingering in local communities for up to three weeks. If passed, the bipartisan legislation will place restrictions on the commercial sale of “non-lethal” riot control weapons […]