An ongoing Associated Press investigation has uncovered deep, previously unreported flaws within the Bureau of Prisons over the last few years, including widespread criminal activity by employees, dozens of escapes, the free flow of guns, drugs and other contraband, and severe understaffing that has hampered responses to emergencies.

Trump announces plans to revive Alcatraz as a federal prison. Explore the infamous facility's history of escape attempts and its transformation from fortress to prison.