ISTANBUL   France is bracing for a larger wave of mobilization on Sept. 18 than on Sept. 10, with over 400,000 people expected to participate in the protests, broadcaster BFM TV reported on Monday. "Sept. 18th will have many more marches than September 10th. Around forty union marches have been declared at the moment," a source told BFM TV, citing the Interior Ministry. Organized by major French trade unions, the mobilization comes in response to controversial budget proposals introduced by