impeaching of Cabinet officials etc

Some body brought up the thought of impeaching of Sec. of State, etc when they go before the congress and either with holding of info from the Congress or deliberating lie or even plead ignorance of the fact. It seems like the Bush administration has set out to lie,with hold info from the congress and even when caught still sneak around the should I say Bush. I have heard that Justices have been impeached but never the Cabinet officials. Something needs to done as some the mining officials in the Bush Cabinet have deliberate lied about the condition of the Mines that workers have to work in. In this case it has been a deliberate cover up by the Bush administration. Maybe when they take the oath of office and that they would have to swear by the constition that they uphold the constition or be impeached. here is my thought and it sounds good.