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Blumenthal contended that Boeing rushed to get the 737 Max into the air to compete with Europe's Airbus and disregarded crucial safety features.

Blaming "deadly loopholes" and "open borders" for allowing drugs and gangs "to pour into our most vulnerable communities", Trump called on Congress to "set politics aside" and overhaul the nation's immigration system.

Boeing has resumed production after a shutdown that led to furloughs of workers throughout the nation and its supply chain.

Boosting African countries' own defense capability will provide a solid foundation for development of the Belt and Road Initiative and a community with a shared future for mankind. The Chinese military is willing to provide comprehensive support to help African nations improve their abilities to tackle security challenges, he said.

Black-necked cranes are seen at Dashanbao National Nature Reserve for Black-necked Cranes in Zhaotong city, Southwest China's Yunnan province. [Photo by Zheng Yuanjian for chinadaily.com.cn]