They are using a bounty hunter named Jango Fett to create a clone army.
Read more Obi-Wan Kenobi QuotesFrom: Star Wars: Episode II - Attack of the Clones (2002)
Sometimes there are things no one can fix.
Count Dooku : You must join me, Obi-Wan, and together we will destroy the Sith!Obi-Wan : I will never join you.
Well that's Anakin's tracking signal, all right. But it's coming from Tatooine. What the blazes is he doing there? I told him to stay on Naboo.