Complex sentence: After passing the exam, he traveled to the United States where he arrived penniless to take up a clinical internship at Muhlenberg Hospital in Plainfield, New Jersey, where doctors from overseas were being recruited to replace those serving in Vietnam.
Split into simpler sentences: After passing the exam, he traveled to the United States arriving penniless. He took up a clinical internship at Muhlenberg Hospital in Plainfield, New Jersey, where doctors from overseas were being recruited to replace those serving in Vietnam.