* Northrop Grumman Corp. extended its $47-a-share offer for rival TRW Inc. after the deadline passed without enough shares tendered to complete the transaction.
* U.S. carriers' air-cargo shipments fell 9.6% in February as more businesses switched to less expensive shipments by truck during the recession.
* Taiwan's government eased a ban on computer chip investments in China, paving the way for one of the country's key industries to move some operations there. Premier Yu Shyi-kun said companies will be allowed to produce less advanced computer chips in China if they move on to make more sophisticated products in Taiwan.
* The U.S. military will negotiate with Boeing Co. to supply new aerial refueling tanker planes after rejecting Europe's Airbus on technical and financing grounds, the Air Force said.
