At 2:26 he appears the Tank Man: between June 3-4, 1989, a few thousand students from Beijing (north-east to China) started a violet riot against China's government in Tiananmen Plaza. On June 5, in the Plaza an unknown man in black pants and white t-shirt stood in front of a row of half dozens tanks to stop its advance, being covered by TV cameras in the place. The identity of Tank Man remains unsolved. It's theorized that 10,000 people died in the riot. It's considered the largest manifestation in China.
At 3:53 it appears the Challenger disaster: on January 28, 1986, space shuttle orbiter Challenger exploded 73 seconds after its launching killing the seven crew members of the mission. Their names and rank in the shuttle were:
-Francis 'Dick' Scobee (born May 19, 1939 - 46 years old), Commander.
-Michael J. Smith (born April 30, 1945 - 40 years old), Pilot.
-Ron McNair (born October 21, 1950 - 35 years old), Mission Specialist.
-Ellison Onizuka (born June 24, 1946 - 39 years old), Mission Specialist.
-Judith A. Resnik (born April 5, 1949 - 36 years old), Mission Specialist.
-Gregory Jarvis (born August 24, 1944 - 41 years old), Payload Specialist.
-Christa McAuliffe (born September 2, 1948 - 37 years old), Payload Specialist.
-Francis 'Dick' Scobee (born May 19, 1939 - 46 years old), Commander.
-Michael J. Smith (born April 30, 1945 - 40 years old), Pilot.
-Ron McNair (born October 21, 1950 - 35 years old), Mission Specialist.
-Ellison Onizuka (born June 24, 1946 - 39 years old), Mission Specialist.
-Judith A. Resnik (born April 5, 1949 - 36 years old), Mission Specialist.
-Gregory Jarvis (born August 24, 1944 - 41 years old), Payload Specialist.
-Christa McAuliffe (born September 2, 1948 - 37 years old), Payload Specialist.