Just last month, Hwang invited him to the U.S. to direct Silver River at the Spoleto Festival, the country's biggest operatic gathering.

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They gathered aboard the Silver Whisper cruise liner moored for the occasion on the Neva River.

BBC: Putin rallies divided world leaders

Since we are fresh from the Diamond Jubilee celebrations, and the Thames River pageant it is worth reminding ourselves of what has been lost since the 1977 Silver Jubilee.

BBC: Jubilees show UK's declining ability to protect itself

In eDNA testing of samples taken in 2011, a year earlier, researchers recorded a positive eDNA test of silver carp above the Coon Rapids dam on the Mississippi River, raising alarm that the fish were heading upstream faster than anticipated.

WSJ: Study finds Asian carp numbers low in Minnesota

Bighead and silver carp imported from Asia decades ago have infested the Mississippi River and many of its tributaries.

WSJ: Study: Asian carp unlikely to stow away in barges