~ EXCERPT ~ JOPLIN, Mo. — About 1,500 people are unaccounted for in this battered city, a Fire Department official said Tuesday, as rescue workers took advantage of a few hours of sunny weather to continue searching for survivors in buildings leveled by the country’s deadliest tornado in more than 60 years. At least 117 people have died. **snip** Earlier Tuesday, President Obama, who is on a state trip in Britain, said that he was monitoring the federal response to the tornado and that he planned to visit Missouri on Sunday “to talk with folks who’ve been affected, to talk...