Tower at Flight 93 memorial to open by 9/11 anniversary

The final phase of the Flight 93 National Memorial is underway and on track to open on the 17th anniversary of plane's crash into a Pennsylvania field during 9/11.United Airlines Flight 93 was en route from Newark, New Jersey, to San Francisco on Sept. 11, 2001, when hijackers seized control and redirected the plane toward Washington, D.C. But 40 passengers and crew members fought back, and the hijackers responded by crashing the plane into the field near Shanksville, about 60 miles (97 kilomete