The deformed cells block blood vessels and cut off the flow of oxygen to tissue in the body.

VOA: special.2009.12.16

"We cannot cut off the flow of foreign workers abruptly but we have to slow the growth, " he said.

BBC: Singapore budget focuses on foreign workers

Would Iran cut off the flow of oil out of the Middle East?

FORBES: If Obama Gets Second Term, Israel's January Attack on Iran Looms Large

New Jersey Natural Gas cut off gas flow completely on Thursday in order to stop the fuel to these fires, but much damage was done.

FORBES: Hurricane Sandy Shows Nuclear Is Safe