Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].

Q: CLOSE ESPN produced a short documentary on  Zaevion Dobson  who was killed protecting his friends from gunfire . Courtesy of ESPN Films
 Zenobia Dobson  wipes away tears as  she  recalls the night  she  learned  her  son Zaevion had been shot. (Photo: Ruth White/News Sentinel)
 Zenobia Dobson  watched  her  sons walk out the door. Then  she  heard the gunshots.
"I knew my sons were out there "  she  testified Thursday. "I just started praying. I was hoping wherever they were that they were safe."
A phone call sent  her  running out the door to the friend's home they'd gone to visit.  Her  older son Zack met  her  in tears.
 A gathering of friends
Zaevion Dobson  15   never made  it  home. The mother relived that night of Dec. 17  2015  on Wednesday before a Knox County Criminal Court jury hearing the case of the three men accused of killing him.
More: Fulton football retires Zaevion Dobson's jersey
More: Playground dedicated in honor of  Zaevion Dobson
 Editorial:  Zaevion Dobson's  legacy of heroism
 CLOSE Zaevion Dobson  a former Fulton football player   would have been a member of the 2018 senior class. Diana C. Nearhos  USA TODAY - Tennessee
 His  sacrifice drew nationwide recognition  including ESPN's Arthur Ashe Courage Award and a tribute from President Barack Obama during a speech on gun violence.
Christopher Drone Bassett  22  Richard Gregory Williams III  23  and Kipling Colbert Jr.  22  are standing trial on charges that include first-degree murder and eight counts of attempted murder in  Dobson 's death. Williams already has been convicted of shooting a witness in the case for "snitching" on him.
 Zaevion Dobson   a 15-year-old Fulton High School student  was fatally shot on Dec. 17  2015. (Photo: Courtesy of Fulton High School)
 Dobson  and friends had just finished the last day of school before Christmas break and gone to a basketball game.  He  and  his  brother swung home to check in with their mother and then headed to Badgett Drive to meet a friend  Faith Gordon  and others at her aunt's apartment.
More: Tennessee's Todd Kelly Jr.  LaTroy Lewis honor  Zaevion Dobson  with speeches

A: Zaevion Dobson trial: 'I just about lost it ' mother testifies
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Q: Sen. Bob Corker (R-TN)  speaks with reporters after announcing  his  retirement at the conclusion of  his  term on Capitol Hill in Washington  U.S.  September 26  2017. REUTERS/Aaron P. Bernstein
WASHINGTON (Reuters)  - U.S. Senator Bob Corker   the influential Republican chairman of the Senate Foreign Relations Committee  said on Tuesday he will not run for re-election  a blow to a party already struggling to balance divisions between mainstream and more populist wings.
An establishment Republican   Corker  has been criticized from the right  and a conservative activist had already announced a primary challenge. But he was expected to keep the seat  and had amassed a $7.5 million campaign war chest.
 Corker  has ruled out running for governor of Tennessee.
âI have no idea what Iâm going to do. No idea whatsoever â  Corker  said in an interview. But he said he was not leaving out of frustration over deep party divides that have often paralyzed Congress.
 Corker  announced  his  retirement on the day of the failure of the latest Republican effort to repeal former Democratic President Barack Obamaâs healthcare law.
âI am not going to be one of the people who leaves here badmouthing what is one of the greatest privileges of oneâs life â  Corker  said.
He said he realized he was ready to retire on Aug. 24 during a factory groundbreaking in Clarksville  Tennessee  and almost announced his decision at least twice before Tuesday.  Corker  said that he made his announcement now to allow a strong candidate time to enter the Senate race.
 Corker  is the first senator to announce  his  retirement ahead of the 2018 mid-term elections  when one-third of the 100-seat chamber will be up for grabs. Tennessee is a solidly Republican state and the party  which currently holds a 52-seat majority in the Senate  is favored to keep his seat.
In his official announcement   Corker  said that âafter much thought  consideration and family discussionâ over the past year  he and his wife Elizabeth âhave decided that I will leave the United States Senate when my term expires at the end of 2018.â
 Sen. Bob Corker (R-TN)  walks away after speaking with reporters after announcing  his  retirement at the conclusion of  his  term on Capitol Hill in Washington  U.S.  September 26  2017. REUTERS/Aaron P. Bernstein
CLASHES WITH  TRUMP
In August  after Trumpâs much-criticized reaction to violence at a white supremacist rally in Virginia   Corker  told reporters in  his  home state Tennessee that Trump had not been able to demonstrate the âstabilityâ or competence that  he  needed to be successful as president.
After the exchange  the two men had an hour-long meeting at the White House this month that  Corker  has described as a wide-ranging and friendly discussion.
 Corker  will remain chairman of the Foreign Relations Committee until he leaves in January 2019. He said he wanted the panel to address issues including Secretary of State Rex Tillersonâs State Department reorganization  food aid reform  and the fight against human trafficking and modern slavery.
 Corker  said the committee would address the international nuclear agreement with Iran  as Trump faces a mid-October deadline for deciding whether to certify that Tehran is complying with that pact. That decision could force Congress to decide whether to reimpose sanctions.  Corker  would not say whether Trump had decided to certify or not.

A: Republican U.S. Senator Corker will not seek re
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Q: Tokyo (AFP) – Sony chief executive Kazuo Hirai  who led a major and successful overhaul at the Japanese electronics giant  will step down at the end of March   the firm  said Friday.
 Hirai  will become Sony chairman  filling a post that has been empty since June 2012  and will be replaced by  the company’s  current chief financial officer Kenichiro Yoshida on April 1.
“As  the company  approaches a crucial juncture  when we will embark on a new mid-range plan  I consider this to be the ideal time to pass the baton of leadership to new management  for the future of Sony and also for myself to embark on a new chapter in my life ”  Hirai  said in a statement.
Sony said  Hirai  had approached the board seeking to step down.
 He  said  he  was “very proud” of the company’s current financial health.
“And it excites me to hear more and more people enthuse that Sony is back again ”  he  added.
 Hirai  praised  his  successor as the “ideal person” to lead Sony going forward  saying the pair had worked closely together since 2013.

A:
Sony CEO Hirai to step down
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