President Obama Had a Blast at His Last White House Science Fair

Amro Halwah showed off what he created with two other students named Stephen Mwingria and Si Ya Wendy Ni who live in New York City. They noticed that trash fires on the subway were causing delays that affected students on their way to school, so they invented a robot that moves along subway rails to vacuum up trash. Amro and Stephen came to the US less than 10 years ago and Si Ya Wendy is a first-generation college student.