When the cat's away, the mice will play means people sometimes misbehave when there is no supervision.
VOA: special.2009.09.27
Even though some states have legalized medical marijuana, the court found that federal law trumps those efforts, and federal law enforcement authorities may now prosecute sick people who use marijuana even under a doctor's supervision.
The recent cases prompted China to announce temperature checks on people traveling back from Cambodia, according to the country's General Administration of Quality Supervision, Inspection and Quarantine.