The UK's Defense Secretary, Grant Shapps, has called on all NATO countries to increase their defense spending to 2.5% of their GDP. He made this statement ahead of the NATO's 75th anniversary summit later this year in Washington D.C. The UK currently spends the most on defense in Europe in real terms, but countries like Poland, Greece, Estonia, and Hungary spend more as a proportion of their GDP. Shapps believes this is necessary to address the demands of a "more dangerous world." The prime minister is expected to make this case at the summit.