US infrastructure 'not improved'
US roads, public transport, aviation, water and sewerage systems are not improving, say America's top engineers.
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| Published | 20:37:43 on Wednesday 28th January 2009 |
| International Date: | 2009-01-28 |
| UK Full Date: | 28/01/2009 |
| UK Short Date: | 28/01/09 |