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"Guidance needs to change and needs to be clear that these nonmedical, nonsurgical masks are beneficial to the general public and should be worn when outside of the home," Robert Hecht, a professor of epidemiology at the Yale University School of Public Health, said in an article published Monday on politico.com.

"For these kids to have the opportunity to be part of the Spurs Family from afar, and now in an up-close, tangible way – in part because of a foundation that was laid before they were born … is pretty special," he added.

"For progressives to invest their energy in a proposal that the Supreme Court has a better than 50 percent chance of declaring unconstitutional, that has very little chance of passing through the Congress, whose revenue potential is extraordinarily in doubt, for that to be the defining element of the progressive agenda in the United States, it seems to me potentially to sacrifice an immense opportunity," he said.

"For 16 years, Cadillac has been committed to bringing a new experience to China's luxury car market," said Wang Yongqing, president of SAIC-GM, which introduced the brand into China in 2003.

"For a private contemporary dance company, it's not easy to survive, let alone perform at such a famous venue like the NCPA.