WASHINGTON (AP) — Summoned by Republicans, a key figure in the Internal Revenue Service's targeting of conservative groups plans to invoke her constitutional right against self-incrimination and decline to testify at a congressional hearing on Wednesday.

REDMOND, Wash. (AP) — Microsoft thinks it has the one.

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, a day after a massive tornado tore through a suburb of Oklahoma City, 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 in the deadliest tornado to hit the United States in two years. ...