WASHINGTON — Saddam Hussein's regime in Iraq has chemical and biological weapons and is seeking to develop nuclear capabilities, U.S. Defense Secretary Donald H. Rumsfeld said Tuesday.
   Rumsfeld said the U.S. government has been explaining to people at home and abroad what this capability plus Iraq's ties to organizations like Al Qaeda mean to the security of the world. He said Iraq's efforts at concealing weapons of mass destruction and the means to deliver them are indicative of the problem worldwide. He said Iraq and other countries are "burrowing underground" to conceal these facilities. They are also building mobile facilities, which make them difficult to find and hit.
   Further complicating the situation is dual-use technologies. These are technologies that have a benign civilian use and a military use. Examples are technologies that can make medicines, but also can be used to make biological weapons.
   Finding all these facilities is difficult. "Think back to Iraq, and the number of inspectors that were milling about that country for a good, long period and the difficulty they had — except when prompted by defectors — to know where things were," Rumsfeld said. More