While the cause of that crash was under investigation, police were also working to determine what triggered the overnight pileup on Lake Ray Hubbard.

Perhaps the best known was the 2009 impact between the defunct Russian Cosmos 2251 spacecraft and the American Iridium 33 satellite. The collision produced over 1,500 trackable fragments, many of which continue to pose a threat to operational missions.

Christophe Deloire - Reporters Without Borders, Secretary General

It called on peop

The project began in 2010 and included sessions with more than 75 Portland-area experts in a variety of fields. That research, along with 10 years of historical data, was used to support the model. The work on the model is assisting the city in identifying drivers of change to be incorporated into the city's 25-year strategic plan.