Astronauts aboard the International Space Station are now scheduled to conduct three spacewalks to replace a malfunctioning coolant pump on the station's exterior.
What happens when ordinary people decide to pay it forward? Extraordinary change...
Germany's Irmela Mensah-Schramm checks lampposts, public benches, anywhere she might find a racist slogan or Nazi swastika. Then she pulls out a bottle of spray paint and covers it.