The North Carolina-based private security firm makes millions training police swat teams and military sharpshooters with courses like "Tactical Pistol II," "Extreme Officer Survival" and "Helicopter Sniper."
But it's the war in Iraq that has been Blackwater's biggest bonanza, CBS News correspondent Bob Orr reports.
Since 2003, U.S. taxpayers have paid Blackwater more than $1 billion in protection money - most of it to guard diplomats, ambassadors, and dignitaries in Iraq.
Blackwater boss, former Navy seal Erik Prince, points to his company's perfect protection record. No client has ever been killed.
"We have never had anyone seriously injured," he said.
But, Blackwater, made up primarily of ex-military commandos, has lost 27 of its own, and now faces multiple investigations into last month's killings of 17 Iraqi civilians.
Prince's critics paint him as a profiteering mercenary, who's landed lucrative no-bid contracts from political cronies inside the Bush Administration.
He was a White House intern during the Presidency of the first George Bush, and since he founded Blackwater a decade ago, he's donated $222,000 to political causes - all but $5,000 to Republicans.
"Blackwater is not a partisan company; we haven't done any, you know, we execute the mission given us," Prince said.
"It's become one of the most powerful private actors in the so-called war on terror," Scahill said.
As one private security source put it, Blackwater, despite any misdeeds, seems to be untouchable - a controversial protection force that may be impossible to replace.