Researchers conducted a randomized trial in 2009 with more than 13,000 students at 18 urban and 14 suburban elementary schools in and around Rochester, N.Y.

Volvo is not the first company to have tested the technology. Porsche has applied flywheels KERS from Williams in both its 911 GT3 R Hybrid and the 918 RSR.

The US government shutdown will enter its ninth day on 9 October and Congress has nine days to decide on whether to raise the US debt limit.

2A: 200-449

Police used tear gas and batons to prevent the protesters getting into the half-empty stadium, and made 26 arrests.