Talk about a graduation present.

Four years, thousands of work hours, $80,000 in fundraising and a last-minute miracle later, a group of Arizona State University students has finished a large-scale charity project just in time for its last two members to graduate.

Five women and one man make up Engineering Smiles, a group that designed a mobile dental clinic that will serve tens of thousands of people in Nicaragua and underserved communities in Arizona and California.

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