Why US flags at pro-Park rallies?

Since the parliament voted to impeach President Park Geun-hye in early December, Park’s staunch supporters have relentlessly taken to the streets with Korean flags in their hands to oppose her removal from office. While the Korean flag has become a symbol of their movement to defend the president, a seemingly unrelated flag has also been carried by many of the — mostly elderly — participants at the rallies: the US flag.