LA Times: Ffty years ago Wednesday, Lyndon Johnson strolled out to the Rose Garden, pressed a fountain pen between the fingers of his hefty right hand and signed into law the highest level of protection ever afforded the American landscape. "If future generations are to remember us with gratitude rather than contempt," President Johnson said later, "we must leave them something more than the miracles of technology. We must leave them a glimpse of the world as it was in the beginning." On that day, America...