But a new analysis of several large studies found little evidence that early detection made a difference.
But last week, the corps was back with a new analysis, and now it says the plan makes economic sense.
For one thing, it was based on a new analysis of old data that had already been published in a 1994 book.
The new analysis included 28 studies of more than 300,000 people.
Due to all of these concerns and complaints, it became clear that situation could not continue much longer without a new analysis.
The findings of the new analysis were supported by a separate study in California.
The numbers of the poorest poor are rising in across America, according to a new analysis.
The new analysis took these concerns into account, and corrected for them.
The new analysis involved 23 other studies, conducted from 1982 to 1994.
They also questioned some techniques used in the new analysis.