DHS secretary plans to implement most of the changes by Oct. 1
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Plan would create a new assistant secretary for cyber security and telecommunications.
Defense Department plan to strip planes from 23 Air Guard units around the country might be unconstitutional.
HHS accused of moving too slowly to issue contracts for vaccines and treatments under the program.
Newly created position would be designed to work on behalf of a list of a group of states with small populations.
New organization will have about 250 helicopters and fixed-wing aircraft.
Army's figure has grown in last several weeks and other services are now devising new cost estimates to relocate their troops.
DHS Secretary Michael Chertoff takes revamp plan to the Hill, but some lawmakers come out swinging with criticisms.
Cost estimates for move as high as $25 billion.
Lawmakers concerned that repeated issues with key space programs are sign of larger problems with the Pentagon's weapons-buying practices.