Many former Warsaw Pact countries became even more interested in negotiations after the dissolution of the pact and conducted their negotiations without the presence and pressure of the Soviet Union. They welcomed transparency, in particular the possibility of openness towards Russia. We assumed that the OST would help revise contracts such as the CFE and the Chemical Weapons Convention and provide additional information to reduce the likelihood of conflict. And while in the United States we knew that we already had the national technical means to obtain information on the activities of other countries, we understood the value of the treaty to other countries. The disintegration of the Soviet Union also created three new nuclear-weapon States, which reinforces the desire for transparency. The initial agreement was signed on April 30, 2007 in Washington, D.C. The agreement entered into force on March 30, 2008. The second phase was signed in June 2010 and has been applied on an interim basis until all signatories are ratified.  Some discussions have taken place on the consequences of the UK`s exit from the EU (Brexit) in 2020 for British and US airlines flying between the UK and the US.  Both the EU and the Secretary of State for Exiting the European Union, David Davis, confirmed that it was likely that the UK would leave the « open skies » agreement between the EU and the US.
  Subsequently, it emerged that the United Kingdom had begun negotiations with the United States for a future air services agreement between the United States and Great Britain.  Over the past four years, the Trump administration has targeted several international treaties, including the 1987 Medium Nuclear Forces Treaty, an important agreement between the United States and the Cold War Soviet Union. Since 2002, 40 missions have been organised over the UK. There were 24 quota missions carried out by: Russia – 20; Ukraine – three; and Sweden – one. There were 16 training flights from: Benelux (jointly with Estonia); Estonia (in conjunction with the Benelux); Georgia – three (a commune with Sweden); Sweden – three (a commune with Georgia); United States – three; Latvia; Lithuania; Romania; Slovenia; Yugoslavia.  Also since 2002, the United Kingdom has carried out a total of 51 open-air missions – 38 quota missions in the following countries: Ukraine (five); Georgia (seven) and Russia (26); 13 missions were training missions in the following nations: Bulgaria; Yugoslavia; Estonia; Slovenia (three); Sweden (three); United States; Latvia, Lithuania and Benelux. Flights cost approximately $50,000 per mission and approximately $25,000 for training missions with approximately $175,000 per year.  We are not working with our allies in a way that would help build consensus on arms control and deterrence issues.