Airports throughout the United States and right here in Idaho were planning on federal dollars from the FAA to fund several different projects. Now, those projects are on hold. Construction crews working on a new tower at the Boise airport have been furloughed after the FAA's budget expired. Lawmakers in Washington, D.C. left for summer recess without being able to agree on temporary funding for the FAA.   The Caldwell airport was expecting to receive $100,000 to $200,000 from the FAA to build new taxiways.    At the Nampa Airport, they were expecting to receive a grant for $1.26 million to repave the runway.  It's estimated that nationally, 4,000 FAA employees and 70,000 construction employees are out of work.