Critics say proposed reorganization misses the mark when it comes to securing borders and stemming the flow of illegal aliens.
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Homeland Security secretary also defends decision to leave management directorate intact.
More than 12,000 managers will attend sessions between now and October.
Four years and $318 million in spending by the Pentagon was not enough to establish a strong enterprise architecture.
Federal task force had alleged that PricewaterhouseCoopers overcharged agencies.
Pennsylvania and Illinois officials filed lawsuits alleging the proposal to move Air National Guard aircraft is unconstitutional.
Plan could break stalemate with legislators.
Shift to pay-for-performance in senior ranks spurs curiosity at lower levels, say panelists at Excellence in Government conference.
House lawmakers stripped similar language from its version of the bill.
Responsibility for agency's military pensions still up in the air.