Manifold destiny: a legendary problem and the battle over who solved it
newyorker.com
newyorker.com
I don't understand topology nearly well enough to understand Perelman's proof, but many mathematicians who do agree that his proof was correct and complete. Then the Chinese (Yau, Zhu, and Cao et al.) came along, and wrote his proof out more explicitly, and tried to claim all (or at least the lion's share) of credit.