Venezuela's political crisis escalates as Maduro tries to wrest parliament from Guaido

Sunday saw new chaos in Venezuela's enduring political and economic disaster. Juan Guaido, leader of parliament and the opposition to President Nicolas Maduro, was physically barred from the National Assembly. Maduro supporters then claimed they'd replaced him as the speaker. But Guaido later rallied enough members of parliament to secure reelection. Special correspondent Marcia Biggs reports.