WASHINGTON (AP) Rep. Chet Edwards, D-Waco, had hoped a House committee would provide money for radiation detection equipment in foreign ports, but the committee voted Tuesday to stay close to the $4.2 billion President Bush requested for homeland security. The House and Senate appropriations committees passed separate spending bills of nearly $80 billion to cover the costs of the war and to provide more money for homeland security. They also included billions in assistance for the airline industry. But Democrats were unsuccessful in boosting homeland security spending beyond what Bush requested. Early in its proceedings Tuesday, the House Appropriations Committee defeated an amendment by Rep. David Obey, D-Wis., to add $2.5 billion to the homeland security total. Edwards had planned to offer an amendment to provide money for the radiation detection equipment, which he said would be needed for helping prevent importing of material for so-called dirty bombs through U.S. ports. After the vote against Obey