上海三类甲状腺结节怎么消除上海肺磨玻璃结节灶7mm需要治疗吗,上海胆囊腺瘤,上海胸部结节2类怎么治疗,上海看皮脂腺毛囊瘤挂什么科,上海奉贤专治高血糖的医院有哪些,上海肝部瘤还能活几年,上海咽喉干有痰吃什么药最好

Can Amazon.com safely deliver packages via unmanned aerial vehicles? That’s the big question facing the online retailer as it embarks on an ambitious effort to create a new aerial fleet of delivery drones that can buzz packages from distribution centers to doorsteps in a matter of minutes.

CNBC reports that Microsoft has spent the weeks since it was awarded the billion, 10-year contract trying to recruit talent from defense contractors and other companies and get security clearances for its employees working on the project. One source told CNBC that Microsoft has already cleared hundreds of engineers. But another source said the tech giant is facing an 18-month bottleneck getting its employees through the security process.

CHICAGO - Activists in Washington, Chicago and dozens of other US cities protested on Monday's Presidents Day holiday against President Donald Trump's declaration of a national emergency to secure funding for a US-Mexico border wall.

CHONGQING - Long and big-bellied Rongchang pigs provide ideal pork for a Chinese delicacy named Huiguorou, or stir-fried pork slices in spicy sauce, but the fame of the pig breed is transcending the catering industry.

Cal Jillson, a political scientist and historian at Southern Methodist University in Dallas, said Trump can veto any challenges that arise from Congress.