 Multiple sclerosis, or Parkinson's, O'Connor said the neurologist also makes visits in support of military personnel assigned to the White House. President Biden will host a high-stakes NATO summit in Washington this week to mark the 75th anniversary of the alliance. Benji Heyer with more. The expanded 32-nation defense pact is vowing to pour more weapons into Ukraine for another year, yet the big prize membership is off the table for now.