2010:03: March Conundrum!

Imagine you have pennies on each of the spots above and you want to move all the pennies to the spots below the line using only checkers moves (jumps over an adjacent penny to the next spot — left or right and up or down, but not diagonal).  Can this be done?  If a penny is removed from a black spot, can this be done?  If two pennies are removed from black spots, then can it be done?