Zelter is known for non-violent direct action campaigns and has been arrested over 100 times in Belgium, Canada, England, Malaysia, Norway, Poland and Scotland, serving 16 prison sentences.
[1] In the 1980s Zelter founded the Snowball Campaign,[1] which encouraged mass civil disobedience with participants each cutting one strand of a fence around US military bases in the UK, then waiting to be arrested.
[2][3][4] Caroline Lucas, future Green party leader and MP was involved in the campaign,[5] and poet Oliver Bernard was sent to prison.
[6] In 1996 she was part of the group Seeds of Hope that disarmed a BAE Hawk Jet, ZH955, causing £1.5million damage and preventing it from being exported to Indonesia where it would have been used to attack East Timor.
[1] Between 2001 and 2005 she was active in many actions with the International Solidarity Movement and other organisations designed to protect the Palestinians on the West Bank against the violence of the Israeli army and of the illegal settlements which made their lives increasingly difficult.