As a former law clerk to Rehnquist, not to mention his immediate successor as Chief Justice, Roberts was an obvious choice to deliver the annual lecture named for Rehnquist at the University of Arizona law school in February.

NEWYORKER: No More Mr. Nice Guy

While the Air Force did not have immediate plans for a successor to the X-51A, it said it will continue hypersonic flight research.

NPR: Experimental Air Force Aircraft Goes Hypersonic

It was almost inevitable that Sunday's World Cup draw would throw the two nations together again, giving McClaren's successor an immediate opportunity for revenge.

BBC: England to face Croatia rematch

Predictions of easing gasoline prices are also being driven by views that there could be potential oil supply overhang concerns coming up in the absence of a strong and immediate message by the successor of Saudi King Abdullah, reinforcing the adherence to self-imposed production limits by OPEC (Organization of the Petroleum Exporting Countries) members.

FORBES: Spiking Summer Gas Prices to Ding Home Sales, Consumer Confidence

Thus decapitated, the House majority would have to have an immediate stuggle to choose a successor.

NPR: 'Washington Times' Calls for Hastert to Resign

He had been due to take part in the election of Pope Benedict's successor next month but said in a statement he would be resigning with immediate effect and would not participate in the vote.

BBC: Scotland