Hundreds gathered in Oklahoma City on Sunday to mark 20 years since the bombing that killed 168 people.
On April 19, 1995, a truck stuffed with tons of explosives blew up at a downtown federal building...
...where the Oklahoma City National Memorial and Museum now stands.
Former President Bill Clinton -- who had been in his first term when the bombing happened -- came to pay his respects.
(SOUNDBITE) (English) FORMER U.S. PRESIDENT BILL CLINTON SAYING:
"You had to choose far-sighted love over blind hatred. You had to choose to redeem your terrible losses by having to begin again."
Responsible for the bombing, which also injured more than 680 people --
Timothy McVeigh, an anti-government militant, who was eventually convicted on federal charges and executed.
His accomplice, Terry Nichols, was slapped with multiple life prison sentences.
The Oklahoma City bombing was one of the deadliest of its kind ever staged on U.S. soil.