Approval Workflow with Escalation question

Hi,

Got a few questions:

1. Can FIM handle escalation of an approval workflow to another user, if the original request is not approved within a given timeframe by the first approver?

2. When the request is escalated to the second user for approval, what happen to the request in the original approver context? Can the original approver still approve the request if its already been escalated? Or do these options actually vanish from the original approver's FIM Portal & Exchange Inbox?

Thx,

SK