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Congress and the Bush administration clashed last week over a proposal to allow Mexican trucks into the United States in a year-long pilot project, with the Senate passing a series of restrictions to the plan and a pair of bills being introduced in the House aimed at stopping it.

Air freight and cargo company Kitty Hawk Inc. said Tuesday it earned $8.3 million or 15 cents a share in the fourth quarter, compared with a loss of $4.1 million or 8 cents a year earlier.

Negotiations between Teamsters and a distributor for diesel engine maker Cummins Inc. continued Tuesday, two days after workers at a West Virginia facility went on strike, the Associated Press reported.

Air cargo shipments inched up 0.6% in February, the Air Transport Association said late Monday.

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The Supreme Court Monday ordered the federal government to take a new look at regulating carbon dioxide emissions from vehicles, in a rebuke to the Bush administration’s policy on global warming, the Associated Press reported.

The Institute for Supply Management’s March manufacturing index slowed and costs rose to the highest since August, ISM said Monday.