By Carey Gillam and Ian Simpson MOORE, Oklahoma (Reuters) - Rescuers went building to building in search of victims and thousands of survivors were homeless on Tuesday after a massive tornado tore through the Oklahoma City suburb of Moore, wiping out whole blocks of homes and killing at least 24 people. The death toll was lower than initially feared, but nine children were among the dead, including seven who died at Plaza Towers Elementary School, which took a direct hit on Monday in the deadliest tornado to strike the United States in two years. ...

By Kevin Murphy KANSAS CITY, Missouri (Reuters) - Less than three hours after a deadly twister on Monday flattened a swath of Moore, Oklahoma, tornado warning sirens sounded in Joplin, Missouri, 215 miles to the northeast. While no twister touched down, the Oklahoma disaster and the sirens stirred painful memories in Joplin, which on Wednesday observes the second anniversary of one of the most catastrophic tornadoes in American history. "It brought back a lot of fear, especially since there was a chance that a tornado could hit here," Sarah Jo Radcliffe, a Joplin resident, said on Tuesday. ...

By Ben Berkowitz and Julie Steenhuysen (Reuters) - Moore, Oklahoma, has had the bad luck of being hit by two highly destructive tornadoes, both in the month of May, 14 years apart. But the Moore that got struck on Monday is not the same as in 1999. Like a lot of towns across America and in the so-called "Tornado Alley," rapid growth has made it a bigger target, vulnerable to more damage. The tornado, with winds that may have topped 200 miles per hour, killed at least 24 people and injured hundreds more, with many of the casualties children from two schools that were destroyed. ...