Pack your bags, Mules. Colby College is promising that, beginning in the fall, every student will be able to study abroad, regardless of income, under a new program made possible by a $25 million gift from a wealthy alumnus. Colby, home to 1,800 students in Waterville, Maine, says it is the first liberal arts college in the country to eliminate the financial barriers to international travel, to ensure that every student gains experience overseas during their undergraduate years. The program, announced Wednesday, will allow students at Colby — whose mascot is the Mule — to travel for work, study-abroad programs, internships, or research. David A. Greene, the private school’s president, said the goal is to make international education accessible to students whose parents may not have connections to internships in foreign corporations or be able to afford an airline ticket and a Eurail pass for a summer of sightseeing in European capitals. The program, which is being funded by Andrew Davis, an investor who graduated from Colby in 1985, will pay for airfare, housing, meals, and stipends to allow students to take unpaid internships, a luxury often available only to higher-income families. “What we’re trying to do is make sure these experiences are universal when students come to Colby, no matter your ability to pay or your own personal network,” Greene said. Currently, 70 percent of Colby students study abroad. Still, the fact that the benefit is being offered to students at an elite New England college like Colby underscores how study-abroad experiences are still out of reach for most college students. Nationally, only 10 percent of American undergraduates, including community college students, study overseas by the time they graduate, according to the Institute of International Education. Mark Farmer, director of higher education and public policy at the Association of International Educators, said it was encouraging to see a private donor at Colby support study-abroad efforts at a time when