"But we had - I think if you look at law enforcement 10 years ago, if you look at the challenges, the FBI was focused excessively on what was happening in the United States"

Robert Mueller is referring to the FBI's focus on domestic issues in the United States 10 years earlier. He is suggesting that the FBI was not paying enough attention to international risks and challenges. This is a crucial point as the FBI is responsible for safeguarding the United States from both domestic and worldwide risks. Mueller is suggesting that the FBI ought to have been more proactive in resolving worldwide threats and challenges in order to much better secure the United States. This is an important pointer that the FBI must remain vigilant in order to protect the United States from both domestic and worldwide risks. It is likewise a suggestion that the FBI should stay nimble and adaptive in order to stay ahead of emerging threats.