President Bush has arrived in the hurricane-ravaged state of Louisiana for his third trip there in the two weeks since Hurricane Katrina and subsequent flooding obliterated wide swaths of the U.S. Gulf Coast. Officials on Sunday say Mr. Bush will spend the night aboard a U.S. Navy ship (the Iwo Jima), moored in New Orleans, before he departs Monday for Gulfport, Mississippi -- virtually destroyed when Katrina hit. Meanwhile, officials in the submerged city of New Orleans say they will begin spraying a pesticide (naled) to kill mosquitos and flies to help minimize disease. They say they are finding fewer bodies than expected in the contaminated waters, indicating that previous reports Katrina killed 10-thousand may be unfounded. Federal officials say a housing task force will be announced in the next several days to provide shelter for the hundreds of thousands displaced by the deadly hurricane.