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Current approaches to distance ( i.e ., time delay ) estimation in the Internet are based on placing Tracer stations in key locations and conducting measurements between them . Over the period in the lead-up to and during the Olympic Games some $ 400 million in investment and trade has been secured , including new investments in the telecommunications , agriculture , manufacturing and IT sectors . The steam cloud in the background is dark because it carries a lot of ash in it . Fictional Governor Willie Stark , played by Sean Penn , stomps around the screen , a compact populist thug with his fist in the air . The F test just produced has residual error in the denominator .