original passage: The number of individuals in the group who have undergone proper military training, and are capable of commanding insurgent forces, is largely unknown. Documents captured in the raid on bin Laden's compound in 2011 show that the core al-Qaeda membership in 2002 was 170. In 2006, it was estimated that al-Qaeda had several thousand commanders embedded in 40 different countries., it was believed that no more than 200–300 members were still active commanders.
original sentence: The number of individuals in the group who have undergone proper military training, and are capable of commanding insurgent forces, is largely unknown.
sentence2: Does the passage suggest that the documents found in Bin Laden's compound were both detailed and reliable accounts of al-Qaeda's strength?
sentence1: The number of individuals in the group who have undergone proper military training, and are capable of commanding insurgent forces, was largely unknown during the first decade of the twenty-first century. Documents captured in the raid on bin Laden's compound in 2011 show that the core al-Qaeda membership in 2002 was 170. In 2006, it was feared that al-Qaeda had several thousand commanders embedded in 40 different countries, while most believed that no more than 200–300 members were still active commanders.