On April 4, 1818, a plan was passed by Congress at the suggestion of U.S. Naval Captain Samuel C. Reid in which the flag was changed to have 20 stars, with a new star to be added when each new state was admitted, but the number of stripes would be reduced to 13 so as to honor the original colonies.
Talks for a new military alliance which could also include North America resulted in the signature of the North Atlantic Treaty on 4 April 1949 by the member states of the Western Union plus the United States, Canada, Portugal, Italy, Norway, Denmark and Iceland.
On April 4, 1959, Genovese was convicted in New York of conspiracy to violate federal narcotics laws. Sent to prison for 15 years, Genovese tried to run his crime family from prison until his death in 1969. Meanwhile, Gambino now became the most powerful man in the Cosa Nostra.
The Eisenhower administration had created a plan to overthrow Fidel Castro's regime in Cuba. Led by the Central Intelligence Agency (CIA), with help from the U.S. military, the plan was for an invasion of Cuba by a counter-revolutionary insurgency composed of U.S.-trained, anti-Castro Cuban exiles led by CIA paramilitary officers. The intention was to invade Cuba and instigate an uprising among the Cuban people, hoping to remove Castro from power. Kennedy approved the final invasion plan on April 4, 1961.
On 4 April 1961, President Kennedy then approved the Bay of Pigs plan (also known as Operation Zapata), because it had a sufficiently long airfield, it was farther away from large groups of civilians than the Trinidad plan, and it was less "noisy" militarily, which would make denial of direct US involvement more plausible. The invasion landing area was changed to beaches bordering the Bahía de Cochinos (Bay of Pigs) in Las Villas Province.
During an April 4, 1967, appearance at the New York City Riverside Church—exactly one year before his death—King delivered a speech titled "Beyond Vietnam: A Time to Break Silence." He spoke strongly against the U.S.'s role in the war, arguing that the U.S. was in Vietnam "to occupy it as an American colony" and calling the U.S. government "the greatest purveyor of violence in the world today".
The plan to set up a shantytown in Washington, D.C., was carried out soon after the April 4 assassination. Criticism of King's plan was subdued in the wake of his death, and the SCLC received an unprecedented wave of donations for the purpose of carrying it out. The campaign officially began in Memphis, on May 2, at the hotel where King was murdered.
The following night on Raw, The Rock and Cena agreed to a match at WrestleMania XXVIII the next year. They then worked together to fend off an attack by The Corre, which at the time consisted of Wade Barrett, Heath Slater, Justin Gabriel, and Ezekiel Jackson.
Speaking on 4 April 2013, the US Secretary of Defense, Chuck Hagel, informed the press that Pyongyang "formally informed" the Pentagon that it "ratified" the potential use of a nuclear weapon against South Korea, Japan and the United States of America, including Guam and Hawaii.
On 4 April 2019, half a billion records of Facebook users were found exposed on Amazon cloud servers, containing information about users’ friends, likes, groups, and checked-in locations, as well as “names, passwords and email addresses.