seventy-five percent complete. April 14 (Flight Day 10 – Final transfers/off duty) The crew of STS-131 continued with transfer activities on the morning of flight day 10. The morning was devoted largely to transferring items to the MPLM Leonardo. There are only a few items awaiting transfer to Space Shuttle Discoverys mid-deck left. The crew enjoyed an hour long mid-day meal with the Expedition 23 crew. The entire joint crew took part in a crew photo, which was followed by a joint crew news conference with U.S., Russian and Japanese media. Later in the day, commander Alan Poindexter, mission specialists Dorothy Metcalf-Lindenburger, Stephanie Wilson, and Clayton Anderson took time out to talk with students from Eastern Guilford High School in Gibsonville, North Carolina and with third and fourth graders from that school district. The majority of the crews afternoon was spent off duty. April 15 (Flight Day 11 – MPLM unberthing) On flight day 11, the MPLM Leonardos hatches were closed at 07:38 UTC (03:38 EDT) and the MPLM was unberthed from the nadir or earth facing port of the Harmony node at 20:24 UTC (16:24 EDT). It was placed in a low hover, about above Shuttle Discoverys payload bay. This was done because the MPLM was unberthed from Harmony later than planned. The delay in unberthing was caused by a set of bolts on the Common Berthing Mechanism (CBM) getting stuck due to a broken pin. The crew will finish putting Leonardo in the payload bay on flight day 12, prior to the docked late inspection. The crews conducted some transfer operations between the ISS and shuttle mid-deck, which brings the overall transfer operations to ninety-four percent complete for the mission. April 16 (Flight Day 12 – Late inspection) On flight day 12, the crew of Space Shuttle Discovery secured the MPLM Leonardo in the payload bay for return to earth. Mission specialist Dorothy Metcalf-Lindenburger activated the latches to secure Leonardo in the payload bay at 07:15 UTC (03:15 EDT). After Leonardo was secured, Metcalf-Lindenburger, pilot Jim Dutton began the late inspection of Discoverys heat shield. The pair were joined by commander Alan Poindexter and mission specialist Naoko Yamazaki to complete the inspection of the shuttle's Reinforced Carbon-Carbon (RCC) panels on the wings and nose and the heat-resistant tiles. The scan, which takes about 7 hours, was completed 3 hours ahead of schedule, and it was done while still