of the Republic of Latvia, the forerunner of the country's Transport Accident and Incident Investigation Bureau, takes on the responsibility for investigating railroad accidents and incidents. 17 April – The airline go! begins operations, providing interisland service in Hawaii. 21 April – During an air show at Marine Corps Air Station Beaufort, the pilot of an F/A-18 Hornet of the United States Navy (USN) Blue Angels flight demonstration squadron loses consciousness during a low-altitude, high-G maneuver. The F/A-18 crashes, killing him, striking homes and ground vehicles, and injuring eight people on the ground. 27 April An air-to-ground missile strike against the village of Saidgi in North Waziristan, Pakistan, near the border with Afghanistan kills four people. The United States and the North Atlantic Treaty Organization (NATO) both deny involvement. A Russian military Mil Mi-8 helicopter carrying 15 special forces troops, two liaison officers, and a crew of three crashes in mountainous terrain near Shatoy in Chechnya, killing all 20 people on board. It is the Russian military's deadliest aviation accident since August 2002. The Government of Portugal establishes the National Institute of Civil Aviation of Portugal (Instituto Nacional de Aviação Civil, I.P.) to serve as Portugal's national civil aviation authority. It replaces the National Institute of Civil Aviation (Instituto Nacional de Aviação Civil), which is abolished on this date. 30 April The European Union and the United States sign the initial phase of the EU–US Open Skies Agreement at a ceremony in Washington, D.C. The agreement allows any airline of the EU and any airline of the US to fly between any point in the EU and any point in the US. It also allows airlines of the US to fly between points in the EU, and airlines of the EU to fly between the US and non-EU countries like Switzerland. The agreement is to become effective on 30 March 2008. May During the month, the final assembly of the first Boeing 787 begins. 2 May – Compass Airlines, a subcontractor regional airline for Northwest Airlines, begins flight operations with a single Bombardier CRJ200. The first flight is from Washington Dulles International Airport in Fairfax County, Virginia, to Minneapolis-Saint Paul International Airport in Hennepin County, Minnesota. 5 May – Kenya Airways Flight 507, a Boeing 737-8AL bound for Nairobi, Kenya, crashes into a swamp just after takeoff from Douala International Airport outside Douala, Cameroon, killing all 114 people on board.