• Video 1 WASP and SCAR complex distribution in wild-type cells.
• Video 2 WASP and Arp2/3 complex in SCAR-null cells.
• Video 3 Visualization of WASP and Arp2/3 in cell spreading.
• Video 4 Self-propagating waves of WASP in SCAR-null cells.
• Supplemental material (PDF)