He also spent time on Earth in his parents' native city of Minsk, later recommending it to Miles O'Brien as one of his favorite places on Earth. Worf did not take the Rozhenkos' last name, preferring to be addressed by the Klingon designation "Worf, son of Mogh". However, his son Alexander Rozhenko, who was raised by the Rozhenkos after his mother K'Ehleyr died, did use their surname. Although Worf was raised by humans, he considered himself a Klingon at heart and studied the ways of his people. As an adult, his mannerisms and personality, as well as his innate sense of honor, became more Klingon than human. Worf's brother Kurn, barely a year old at the time of the Khitomer attack, had been left behind on the Klingon homeworld Qo'noS by his parents. Lorgh, a friend to House of Mogh (appearing only in dialog of the episode "Sins of the Father"), was charged with the care of the younger son, originally expecting Mogh's stay at the Khitomer outpost to be short-term. Lorgh adopted Kurn after the attack, but informed Klingon authorities that he had died with the rest of the family. Kurn was not revealed as being alive until both brothers were adults. In 2357, Worf entered Starfleet Academy. He graduated in 2361 and was commissioned with the rank of Ensign, becoming the first Klingon officer in Starfleet. Although Worf took immense pride and a sense of honor from serving in Starfleet, most other Klingons shunned and belittled his choice of vocation. In 2359, he became briefly involved with K'Ehleyr who was the daughter of a Klingon father and a human mother. The Next Generation In 2364, Worf was assigned to the USS Enterprise-D as relief flight control and tactical officer with the rank of lieutenant junior grade (TNG: "Encounter at Farpoint"). The next year, he was made Acting Chief of Security following the death of Tasha Yar, even though he believed that a promotion due to the death of a comrade was not honorable (TNG: "Skin of Evil"). The next year, he transferred to operations division and was formally made Chief of Security (TNG: "The Child"). In 2365, he renewed his relationship with K'Ehleyr when she came aboard the Enterprise as a Federation emissary on an urgent mission. He proposed marriage but was rejected (TNG: "The Emissary"). In 2366, he was promoted lieutenant (TNG: "Evolution"). After an accident caused