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Coronal mass ejections (CMEs) are the main driver of Space Weather.Therefore, a precise forecasting of their likely geo-effectiveness relies on anaccurate tracking of their morphological and kinematical evolution throughoutthe interplanetary medium. However, single view-point observations require manyassumptions to model the development of the features of CMEs, the most commonhypotheses were those of radial propagation and self-similar expansion. The useof different view-points shows that at least for some cases, those assumptionsare no longer valid. From radial propagation, typical attributes that can nowbeen confirmed to exist are; over-expansion, and/or rotation along thepropagation axis. Understanding of the 3D development and evolution of the CMEfeatures will help to establish the connection between remote and in-situobservations, and hence help forecast Space Weather. We present an analysis ofthe morphological and kinematical evolution of a STEREO B-directed CME on 2009August 25-27. By means of a comprehensive analysis of remote imagingobservations provided by SOHO, STEREO and SDO missions, and in-situmeasurements recorded by Wind, ACE, and MESSENGER, we prove in this paper thatthe event exhibits signatures of deflection, which are usually associated tochanges in the direction of propagation and/or also with rotation. Theinteraction with other magnetic obstacles could act as a catalyst of deflectionor rotation effects. We propose, also, a method to investigate the change ofthe CME Tilt from the analysis of height-time direct measurements. If thismethod is validated in further work, it may have important implications forspace weather studies because it will allow infer ICME orientation.

Inner Heliospheric Evolution of a "Stealth" CME Derived From Multi-view Imaging and Multipoint In--situ observations: I. Propagation to 1 AU