- Apr 1 Google introduces Gmail: the launch is met with skepticism on account of the launch date
- Apr 2 Islamist terrorists involved in the 11 March 2004 Madrid attacks attempt to bomb the Spanish high-speed train AVE near Madrid. Their attack is thwarted.
- Apr 3 Islamic terrorists involved in the 11 March 2004 Madrid attacks are trapped by the police in their apartment and kill themselves
- Apr 6 Rolandas Paksas becomes the first president of Lithuania to be peacefully removed from the post by impeachment.
- Apr 8 Darfur conflict: The Humanitarian Ceasefire Agreement is signed by the Sudanese government and two rebel groups
9/11 Attack on New York's World Trade Towers
Apr 8 U.S. National Security Advisor Condoleezza Rice testifies before the 9/11 Commission
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- Apr 16 The super liner Queen Mary 2 embarks on her first Transatlantic crossing, linking the golden age of ocean travel to the modern age of ocean travel.
- Apr 20 In Iraq, 12 mortars are fired on Abu Ghraib Prison by insurgents, killing 22 detainees and wounding 92.
- Apr 22 Two fuel trains collide in Ryongchon, North Korea, killing up to 150 people.
- Apr 24 United States lifts economic sanctions imposed on Libya 18 years ago, as reward for cooperation in eliminating weapons of mass destruction
Shrek the Sheep
Apr 28 Shrek the sheep from Tarras, Central Otago, New Zealand, is finally shorn live on TV after 6 years avoidance; the fleece weighed 27 kg (60 lb)
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Event of Interest
Apr 29 Dick Cheney and George W. Bush testify before the 9/11 Commission in a closed, unrecorded hearing in the Oval Office
Dick Cheney
George W. Bush