President Barack Obama met with the Navy SEALs who carried out the raid on Osama bin Laden's compound to tell them thank you in person, Friday.
The SEALs have already been talking to CIA investigators about the mission. The president met with them at Fort Campbell, Ky., though the team remains anonymous.
Meanwhile, a new bulletin from Homeland Security websites and schematics found in bin laden's home suggests al-Qaeda was contemplating an attack against trains in the U.S. on the 10th anniversary of Sept. 11.
"It is entirely possible couriers were bringing bin Laden computer discs and other material on thumb drives that might have had plots on them," Richard Clarke, a former national security official, said.
"We have no information of any imminent terrorist threat to the U.S. rail sector, but wanted to make our partners aware of the alleged plotting," Department of Homeland Security spokesman Matt Chandler said.
"It is unclear if any further planning has been conducted since February of last year," he said.
While Americans are proud of the SEALs' success in the raid, some are questioning the legality of killing the world's top terrorist.
A U.N. independent investigator is calling on the U.S. to reveal more details of the mission in an effort to verify the U.S. did not violate international human rights laws. The raid has also strained U.S. relations with Pakistan.
But in all the talk of bin Laden's death, America's leaders say it is important to remember the thousands who lost their lives in the 9/11 attacks.
"When we say we will never forget, we mean what we say," the president said Thursday at the Manhattan firehouse that sustained the most losses to World Trade Center attacks.
Patricia Reilly, who lost her sister that day, did not hesitate to thank the men responsible for killing the world's most wanted man.
"I was so grateful that the last thing Osama bin Laden saw was an American soldier who came to get him for what he had done to us," she said.
Despite the concerns now being raised by the United Nations, U.S. officials said the raid on bin Laden's Pakistan compound is legal under both U.S. and international law.