Bush Blames Palestinian AuthoritiesTERENCE HUNTAssociated Press ABOARD AIR FORCE ONE - President Bush blamed Palestinian authorities Wednesday for the deaths of Americans in an attack in Gaza, saying their failure to create terrorist-fighting security forces "continues to cost lives.""Palestinian authorities should have acted long ago to fight terror in all its forms," the president said in a written statement as he flew to California for an overnight visit en route to Asia.Bush said he condemned the attack in the strongest terms and that the United States was working with authorities to bring the perpetrators to justice.Putting the blame squarely on...