US President Donald Trump has repeatedly credited his February ban on travellers from mainland China as his signature move against the advance of the coronavirus pandemic -- a strong wall that allowed only US citizens inside, he boasted in May.
But Trump's wall was more like a sieve.
Exempted were thousands of residents of the Chinese territories of Hong Kong and Macau. Efforts to track US residents returning from mainland China were riddled with errors and broken communications.
An analysis of Commerce Department travel entry records and private aviation data obtained by The Associated Press shows that nearly 8,000 Chinese