Flight 93 Memorial Ceremonies mark 25 years since 9/11: What you need to know

Memorial ceremonies for Flight 93 mark 25 years since the 9/11 attacks. Mark Jacobson, an International Spy Museum historian and retired US Navy Intelligence Officer, recalls his experience inside the Pentagon during the impact and the struggle to contact his family. Jacobson notes that while counterterrorism evolution has made the country more secure against terrorist attacks compared to 25 years ago, he expresses concern regarding the current tendency of the United States to undervalue its international allies.