It's been a busy and successful few months for the FBI. The feds captured three of the men on its famous "Ten Most Wanted Fugitives" list since July. So -- you guessed it -- last week the FBI added three new new criminals to the list.

They are:

Semion Mogilevich: A Ukrainian businessman, Mogilevich is charged in 40 economic crimes carried out in dozens of countries around the world, including bilking investors in a Philadelphia company out of $150 million. He is living in Moscow, but Russian law prohibits his extradition to the U.S.

Joe Luis Saenz: A gang leader, Saenz is accused of murdering two rival gang members in Los Angeles, as well as his own girlfriend, in 1998. The FBI thinks this is just the tip of the iceberg. Special Agent Scott Garriola calls Saenz "one of the worst offenders I have ever seen,” adding, “He’s got a long career of killing, and that’s just what we know about.” He's believed to be living somewhere in Mexico.

Eduardo Ravelo: The FBI says Ravelo is the head of a drug gang called Barrio Azteca, operating out of Juarez Mexico, across the border from El Paso, Texas. He's wanted for racketeering, money laundering and selling cocaine and heroin. Although he is not charged with murder, the FBI says Ravelo and his gang have carried out multiple murders-for-hire for Mexican drug cartels.

Other fugitives on the list include Osama bin Laden, and James (Whitey) Bulger. If that names sounds familiar, it's because Jack Nicolson played a character based on Bulger in the Academy Award winning film The Departed. Even though he's 80-years-old, Bulger is considered armed and dangerous.

Since its creation in 1950, 493 fugitives have appeared on the list. Of those, a whopping 463 have been apprehended or located. That's a success rate of 94 percent. The public has helped capture 152 of them. The FBI offers rewards for information leading to the capture of most wanted fugitives, ranging from $100,000, to up to $25 million for hunting down bin Laden.