The projected opening date of the Capitol Visitor Center has been pushed back again, from September to summer 2007, because of continued construction problems. The $584 million project is already more than two years behind schedule and $200 million over budget, but architect Alan Hantman told a Senate subcommittee last week that problems with the fire protection system, gift shops and utility tunnel will cause more delays. The new tentative time frame of July 2007 appears to be reasonable, said officials with the Government Accountability Office. The wall stone installation is well behind schedule, the fire alarm system has been...