
When actress Tippi Hedren visited a Vietnamese refugee camp in California 40 years ago, the Hollywood star's long, polished fingernails dazzled the women there.
Hedren flew in her personal manicurist to teach a group of 20 refugees the art of manicures. Those 20 women - mainly the wives of high-ranking military officers and at least one woman who worked in military intelligence - went on to transform the industry, which is now worth about $8bn (£5.2bn) and is dominated by Vietnamese Americans.
"We were trying to find vocations for them," says Hedren, who is perhaps best known for starring in Alfred Hitchcock's The Birds and for running a wildcat sanctuary at her home in Southern California.
"I brought in seamstresses and typists - any way for them to learn something. And they loved my fingernails."
Hope Village, the refugee camp, was in Northern California near Sacramento. Aside from flying in her personal manicurist, Hedren recruited a local beauty school to help teach the women. When they graduated, Hedren helped get them jobs all over Southern California.
"I loved these women so much that I wanted something good to happen for them after losing literally everything," Hedren told the BBC from a museum she is building next to her home. The museum includes Hollywood memorabilia, a few photos of the women at Camp Hope and awards she's won from the nail care industry.
"Some of them lost their entire family and everything they had in Vietnam: their homes; their jobs; their friends - everything was gone. They lost even their own country."
The Vietnamese gave the nail salon business a radical makeover.