Title: Timeline of the John F. Kennedy assassination
Content:  they rode in a motorcade through the streets of Dallas less than an hour ago. Governor Connelly is in serious condition, President John Kennedy is dead. The 35th president of the United States, he was 46 years old. According to the constitution, Vice President Lyndon Johnson will now succeed Mr. Kennedy in office. Mr. Johnson will become the 36th president of the United States, very probably within a few hours upon taking the oath of office." After Jackson's announcement, his co-anchor Dallas Townsend added: "Well, as a matter of fact, Allan, Lyndon Johnson is now the president whether he takes the Oath or not. He is the president." Townsend's comment was followed by "The Star-Spangled Banner".
Title: List of presidents of the United States who died in office
Content:   The most recent U.S. president to die in office is John F. Kennedy, who was assassinated on November 22, 1963, in Dallas, Texas. He was fatally shot by Lee Harvey Oswald, who fired three shots from a sixth floor window of the Texas School Book Depository at 12:30p.m. as the presidential motorcade passed through Dealey Plaza. Riding in the vehicle with the president were First Lady Jackie Kennedy, Texas governor John Connally, and Connally's wife Nellie; Governor Connally was also seriously wounded in the attack. The motorcade rushed to Parkland Memorial Hospital, where Kennedy was pronounced dead about 30 minutes later; Connally recovered from his injuries. Vice 
Title: Let Us Continue
Content:  On November 22, 1963, President John F. Kennedy was assassinated in Dallas, Texas, at about 12:30 p.m. CST. Upon his death, vice president Lyndon B. Johnson accessioned to the presidency. Johnson took the oath of office aboard Air Force One. After the plane landed at Andrews Air Force Base near Washington, D.C., he gave a brief address to the public, which lasted less than 40 seconds. Kennedy's widow Jacqueline Kennedy, his brother Robert F. Kennedy, and his children remained at the center of media and public attention in the following days. This was particularly salient during the funeral ceremonies on November 25, 1963. Johnson, who had fallen 
Title: Presidency of Lyndon B. Johnson
Content:   When Johnson assumed office following President Kennedy's death, he asked the existing Cabinet to remain in office. Despite his notoriously poor relationship with the new president, Attorney General Robert F. Kennedy stayed on as Attorney General until September 1964, when he resigned to run for the U.S. Senate. Four of the Kennedy cabinet members Johnson inherited—Secretary of State Dean Rusk, Secretary of the Interior Stewart Udall, Secretary of Agriculture Orville L. Freeman, and Secretary of Labor W. Willard Wirtz—served until the end of Johnson's presidency. Other Kennedy holdovers, including Secretary of Defense Robert McNamara, left office during Johnson's tenure. After the creation 
Title: 1962 United States Senate special election in Massachusetts
Content:  Senator John F. Kennedy resigned the seat to become President of the United States, after winning the presidential election in 1960. Benjamin A. Smith II, a Kennedy family friend, was appointed to succeed Kennedy, serving as a placeholder for Edward M. "Ted" Kennedy, who, at the time, was too young to be constitutionally eligible for the seat.
Title: Lyndon Baines Johnson Day
Content:  Senator John F. Kennedy of Massachusetts to be his running mate. They went on to win the election and Johnson was sworn in as Vice President on January 20, 1961. Two years and ten months later, on November 22, 1963, Johnson succeeded Kennedy as President following the latter's assassination. He ran for a full term in the 1964 election, winning by a landslide over Republican Arizona Senator Barry Goldwater. He is one of four people who have served as President, Vice President, and in both houses of Congress. The other three who have served in all four elected offices were John Tyler, Andrew Johnson (no relation to Lyndon), and (Lyndon's successor as president) Richard Nixon.
Title: Robert F. Kennedy
Content:  died two days after his birth in August 1963, and a stillborn daughter, Arabella, both children of President Kennedy and his wife, Jacqueline, also occurred at night.) After the president was interred in Arlington Cemetery, the two infants were buried next to him on December 5, 1963, in a private ceremony without publicity. His brother, Senator Edward M. Kennedy, was also buried at night, in 2009. On June 9, President Lyndon B. Johnson assigned security staff to all U.S. presidential candidates and declared an official national day of mourning. After the assassination, the mandate of the U.S. Secret Service was altered by Congress to include the protection of U.S. presidential candidates.
Title: Presidential transition of John F. Kennedy
Content:  resigned his seat in the United States Senate. On January 3, immediately after taking an oath for the new Senate term to which he had been elected in the November 1960 Senate election (which coincided with the presidential election), Vice President-elect Johnson resigned from his Senate seat. That day, at the urging of president-elect Kennedy, Mike Mansfield successfully ran to be senate majority leader at the meeting of the Senate Democratic caucus held at the Dirksen Senate Office Building. After Mansfield was elected to the position, Johnson asked Mansfield to allow him to have office S-211 (which Johnson been using as his office while senate majority leader) and several other 
Title: Second inauguration of Richard Nixon
Content:  Just four weeks after the death of former president Harry S. Truman, former president Lyndon B. Johnson, whom Nixon replaced in the White House since January 1969, died of a heart attack at the age of 64, two days after Nixon's second inauguration. Johnson thus became the sixth president who died during his immediate successor's administration, following George Washington (1799), James K. Polk (1849), Andrew Johnson (1875), Chester A. Arthur (1886) and Calvin Coolidge (1933), who died during the administrations of John Adams, Zachary Taylor, Ulysses S. Grant, Grover Cleveland (1st term), and Herbert Hoover, respectively. Many of the ceremonies that the Armed Forces Inauguration Committee had planned during the ten days had to be canceled to allow for a full state funeral. Many of the military men who participated in the inauguration took part in the funeral. Johnson's casket traveled the entire length of the Capitol, entering through the Senate wing when taken into the rotunda to lie in state, and exiting through the House wing; this was due to construction on the East Front steps.
Title: Assassination of John F. Kennedy
Content:  needed. A Dallas County justice of the peace signed the official record of inquest as well as a second certificate of death. A few minutes after 2:00 p.m, Kennedy's body was taken from Parkland Hospital to Love Field. His casket was loaded into the rear of the passenger compartment of Air Force One in place of a removed row of seats. Vice President Lyndon Johnson had accompanied Kennedy to Dallas and been riding two cars behind Kennedy's limousine in the motorcade. He became President as soon as Kennedy died and, at 2:38 p.m., with Jacqueline Kennedy at his side, he was administered the oath of office by federal judge Sarah Tilghman Hughes aboard Air Force One shortly before departing for Washington.

Question: who was vice president after kennedy died?
Answer: Lyndon B. Johnson.