Watch: A Graduation Day Surprise and Four Other Videos That Inspired Us in May

Ruby Robinson faced a bittersweet reality as she prepared to receive her degree from Columbia University’s engineering school last week. Ruby’s father, U.S. Army Capt. Keith Robinson, had been stationed in northern Afghanistan for the last six months, and she understood that he would not be able to make it to her commencement ceremony. At least she thought he would not make it. More than 14 hours and multiple flights later, Capt. Robinson arrived in time to hug his daughter after she shook hands with University President Lee Bollinger. Watch this touching moment and four other videos that inspired us this month.
Watch the full videos here:
Watch Why This Homeless Man Breaks Down In Tears After Walking Into His Friend’s House
This Army Dad’s Mission? To Attend His Daughter’s Graduation
Going ‘Round and ‘Round, This Water Wheel Is Ridding Baltimore’s Polluted Harbor of Its Trash
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Going ‘Round and ‘Round, This Water Wheel Is Ridding Baltimore’s Polluted Harbor of Its Trash

When it comes to cleaning up the polluted Baltimore Harbor, there’s really no need to reinvent the wheel. Literally.
Sitting permanently at the mouth of the Jones Falls stream in Baltimore between Pier 6 and Harbor East, is the Water Wheel Trash Inceptor.
So what does this large, round object do? For starters, this water wheel cleans up the harbor — sucking up to 50,000 pounds of trash a day, or about 750,000 pounds of trash a year, estimates say. At this rate, the organizers at the Waterfront Partnership of Baltimore hope that the Harbor might actually be safe for swimmers by 2020.
Impressively, the wheel (which is powered by solar panels and water currents) is also generating 2,500 watts of electricity a day, an amount that could power the average Maryland home, Inhabit reports.
MORE: How the Oyster is Cleaning Up the Chesapeake Bay
“I was tired of always hearing tourists say ‘ugh, this harbor’s disgusting’,” Water Wheel co-designer John Kellett told Inhabit. “I thought, there’s got to be a better way than collecting trash on our front doorstep.” In a mere seven months, Kellett and his partner Daniel Chase at Clearwater Mills successfully built their trash-collecting contraption. (To see how it works, watch the videos below.)
Besides those aforementioned benefits (which are downright great), the wheel is also improving the quality of water for the fish and underwater ecosystems. And that’s not all. As WBAL-TV points out, the wheel is helping educate kids and adults about keeping trash off the streets.
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“It’s a thrill to see this new technology being applied to an age-old problem like trash,” Laurie Schwartz, the president of Waterfront Partnership, told the local television station.
Sounds like the wheel — which was originally designed to move items somewhere, but is now being used to remove unwanted things — really has come full circle.