NATO summit kicks off in DC

World leaders from NATO's 32 member countries arrive in Washington DC today for a summit to mark the alliance's 75th anniversary. Ukraine will be top of the agenda after yesterday's missile attacks - but Kyiv's immediate hopes for membership of the organisation seem likely to be dashed again. The meeting will also be a public test for 81-year-old US President Joe Biden. Washington correspondent Caroline Malone spoke to Corin Dann.