An American aid worker kidnapped by Somali pirates in 2011 and rescued by Navy Seal Team Six has a book deal.

As Navy SEALs bask in the limelight for daring missions, some in the Army are wondering whether the other half of the nation's counter-terrorism covert warriors — Delta Force — is being upstaged and left in the shadows.

The Navy SEAL operation that freed two Western hostages in Somalia is representative of the Obama administration's pledge to build a smaller, more agile military force that can carry out surgical counterterrorist strikes to cripple an enemy.

The same U.S. Navy SEAL unit that killed Osama bin Laden parachuted into Somalia under cover of darkness early Wednesday and crept up to an outdoor camp where an American woman and Danish man were being held hostage. Soon, nine kidnappers were dead and both hostages were freed.

"Good job tonight," President Obama told his defense chief as he arrived for his annual State of the Union message. Unknown to a global television audience watching Tuesday night's speech moments later, a hostage rescue operation had just played out half a world away with an elite Navy SEAL team's rescue of two hostages in Somalia, one of them an American.

The same U.S. Navy SEAL unit that killed Osama bin Laden parachuted into Somalia under cover of darkness early Wednesday and crept up to an outdoor camp where an American woman and Danish man were being held hostage.