Republican Sen. John McCain says new senators could use some schooling on world affairs.

The chairman of the Senate Armed Services Committee is opening the first in a series of hearings Wednesday featuring veterans in foreign policy. Former national security advisers Zbigniew Brzezinski and Brent Scowcroft are the first to, in McCain's words, "educate the members" on a policy that's more interventionist than President Barack Obama's.

Some conservatives, including Kentucky Sen. Rand Paul, have urged non-intervention when it comes to current conflicts overseas.

Forty-six of 100 members are in their first Senate terms, many with little to no experience in foreign affairs.

Other national security stalwarts, such as former secretaries of state Madeleine Albright and James Baker III, are slated for later hearings.