Towards the end of April 2011, however, the doctor became suspicious that the CIA was after a high-value target in the Abbottabad compound.

BBC: Profile: Shakil Afridi

The U.S. government does not comment officially on such designations, but being considered a high-value target would potentially put him in the crosshairs of the United States.

CNN: Al-Awlaki's father asks Obama to end manhunt

According to him, Dr Afridi did get suspicious by late April 2011 that there might be a high-value target in the Abbottabad compound, but he still didn't know who it was.

BBC: Was 'Bin Laden doctor' Shakil Afridi an unsuspecting pawn?

This is a common way for attackers to target high-value users.

FORBES: How reputation services enhance IPS

Last week, France called for the European Central Bank (ECB) to consider setting a target for the single currency - steering it lower when the value became too high.

BBC: Euro rises as finance ministers meet