World shot put record holder Randy Barnes and Olympic sprint champion Dennis Mitchell have been suspended indefinitely after positive doping tests.

世界铅球纪录保持者兰迪·巴恩斯和奥运会短跑冠军迪尼斯·米切尔由于药检呈阳性，被无限期禁赛。

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The city plans to enhance services to riders in the coming year, including the application to provide bus arrival times to passengers waiting along bus routes, according to Dennis Mitchell, the advanced transportation management systems project manager with Oregon's Department of Transportation.

CNN: Oregon offers real-time bus stop data

Others who have travelled the well-worn path include former Senator George Mitchell, retired Marine General Anthony Zinni and diplomats William Burns and Dennis Ross.

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