What happened 30 April in United States of America

Hooker was routed by Lee at the Battle of Chancellorsville in May, then resigned and was replaced by George Meade. Meade followed Lee north into Pennsylvania and beat him in the Gettysburg Campaign, but then failed to follow up despite Lincoln's demands. At the same time, Grant captured Vicksburg and gained control of the Mississippi River, splitting the far western rebel states.

He soon instituted phased U.S. troop withdrawals (From Vietnam), but also authorized incursions into Laos, in part to interrupt the Ho Chi Minh trail, which passed through Laos and Cambodia and was used to supply North Vietnamese forces. Nixon announced the ground invasion of Cambodia to the American public on April 30, 1970.

The final restrictions on carrying commercial traffic ended on April 30, 1995 when the National Science Foundation ended its sponsorship of the NSFNET Backbone Service and the service ended.

On April 30, 2009, the U.S. State Department reported that al-Zawahiri had emerged as al-Qaeda's operational and strategic commander and that Osama bin Laden was now only the ideological figurehead of the organization. However, after the 2011 death of bin Laden, a senior U.S. intelligence official was quoted as saying intelligence gathered in the raid showed that bin Laden remained deeply involved in planning: "This compound (where bin Laden was killed) in Abbottabad was an active command-and-control center for al-Qaeda's leader. He was active in operational planning and in driving tactical decisions within al-Qaeda."

In early-April 2019, Facebook announced that it would be pulling its apps from Windows Phone on April 30, 2019, including Facebook, Messenger and Instagram.

On April 30, 2020, the United States reached 1 million infections, just over a quarter of the total infections in the world.