just some of the ways those that knew 23-year-oldli lingzu lu a question. >> we all loved her. >> reporter: after starting as a boston university grad student last year, lu quickly became a well-known figure in the school of mathematics and statistics where she was studying. >> i admitted her, i recruited her, i welcomed her, i advised her, i taught her. i interacted with her on so many different levels. >> reporter: her professor said she was an excellent student who had big dreams to study in the u.s. so she could go back to china as a businesswoman. how hard is that, to know what a bright future she had and that's been taken away from her? >> i -- i can't say how hard it is. i mean, it's completely senseless. it's -- there's no rhyme or reason to it. it's such a waste. it's such a waste of all the time and energy and dreams that she had and we'll never know what she could have done. >> reporter: dreams cut short monday on what was supposed to be a day of fun watching the boston marathon with two friends. she was standing at the finish line when the bombs went off. her roommate posted th

just some of the ways those that knew 23-year-old lingzu lu described her. >> her smile was really shy all loved her. >> reporter: after starting at a boston university grad student last year, lu quickly became a well known figure in the school of mathematics and statistics where she was studying. >> i admitted her, i recruited her, i welcomed her, i advised her and i taught her. so i interacted with her on so many different levels. >> reporter: her professor said she was an excellent student who had big dreams to study in the u.s. so she could go back to china as a business woman. how hard is that to know what a bright future she had and that's been taken away from her? >> i can't say how hard it is. i mean it's completely senseless. it's -- there's no rhyme or reason to it. it's such a waste. it's such a waste of all the time and energy and dreams that she had and we'll never know what she could have done. >> reporter: dreams cut short monday on what was supposed to be a day of fun watching the boston marathon with two friends. she was standing at the finish line when two bombs went

her name is lingzu lu, a native of china. her parents and family members apparently interviewed in chinese media. she was an only child. she had gone to the race with two of her friends, one of whom went to the hospital. we believe, andrea, is still hospitalized. >> everyone was withholding the name, the family had not been fully notified. there were grandparents involved, a terrible, terribly sad story for this young graduate student. there were a number of chinese-born graduate students, chinese natives at boston university, and of course the boston community is filled with foreign students studying there. so really sad case there. >>> when we talk about some of the terrible injuries, we know of one family where two adult brothers each lost a limb, each lost a leg. we know the young sister of martin richard, was an amputee. the doctors are trying to save limbs, but they're really trying to save lives. that is the essential ingredient here. >> when you talk to his doctors, and it's heartbreaking, they say this is one of the

from here the students of boston university are preparing for a memorial service for grad student lu lingzuho was killed during last week's attacks. brian? >> what a terrible week in boston. katy tur there tonight. thanks. >>> much of the focus of the investigation now concerns the region of the world where these accused brothers once lived. specifically what the older brother did there when he went home for a six-month period. nbc news london-based correspondent adrian mong went to the russian republic of dagestan and spoke with the suspect's father. >> reporter: half a world away from boston, anzar tsarnaev struggles to understand. he cannot believe his boys were behind the carnage in boston. the last time he spoke to them was thursday night, three days after the bombings. i asked, how are things, he said. like it was any other normal conversation. anzar calls dzhokhar an innocent child and described tamerlan as a gifted boxer but gentle and homesick. he said during tamerlan's visit last year he talked about moving back. but if tamerlan had become alienated in america, angry or radicalize

china whos are with the lu family of china who sent their daughter lingzu to b.u. so that she could experience all the city has to offer. and our hearts are broken for eight-year-old martin with his tig smile and bright eyes. and we're left with two enduring images of this little boy, forever smiling for his beloved bruins and forever expressing a wish he made on a blue poster board-- "no more hurting people. peace." even when it hurts, even when our heart aches, we summon the strength that maybe we didn't even know we had and we carry on. we finish the race. ( applause ) we finish the race, and this time next year on the third monday in april, the world will return to this great american city to run harder than ever and to cheer even louder for the 118th boston marathon. ( cheers and applause ) >> reporter: the president also brought an inspirational message, scott, to those crippled by the bombings. you will stand, he said, you will walk, and you will run. maybe next year, scott, and for some, maybe sooner. >> pelley: major, thank you. the president also addresse

. ♪ our prayers are with the lu family of china who sent their daughter lingzu for all of the city that offer. she was a student far from home and in the heart take of her friends and family on both sides of the great ocean, we're reminded of the mun manti that we all share. our prayers are with the richard family of dorchester and our hearts are broken for 8-year-old martin with his big smile and bright eyes. and we're left with two enduring images of this little boy, forever smiling for his beloved bruins and forever expressing a wish he made on a blue poster board. "no more hurting people. peace." if they sought to intimidate us, to terrorize us, well, it should be pretty clear by now that they picked the wrong city to do it. [ applause ] not here in boston. not here in boston. >> people are bruised in boston but they are not broken and they are bruised here in west but they are not broken and they never will be. and we'll be right back. woman: everyone in the nicu -- all the nurses wanted to watch him when he was there 118 days. everything that you thought was important to you chang