General Dynamics said it received an $800-million...

General Dynamics said it received an $800-million credit line in connection with its $30-a-share cash tender offer for all of Cessna Aircraft’s outstanding common shares . . . Financier Carl C. Icahn said he increased his stake in Trans World Airlines to 55.3% from 52% . . . The opening bell at the New York Stock Exchange will begin ringing half an hour earlier on Sept. 30 in the first extension of trading hours at the NYSE in more than a decade . . . Circle K Corp. said it has completed its previously reported acquisition of all of the stock of Shop & Go Inc.